43 Signs Your Girlfriend Just Slept With Someone Else

Last updated on May 12, 2024 by Michelle Devani

Have you been noticing a change in your girlfriend’s behavior?

Does she seem different somehow?

Perhaps you can’t find the answer why... 

If so, this guide is here to help. It features 41 clear signs that your girlfriend is sleeping with someone else. 

However, before I reveal these clearcut signs of infidelity, I want you to read the following sentences carefully. 

It’s not always possible to know if a woman has been unfaithful from her body language. Some of them are icey masters of deception. 

That’s why I want to recommend the online tool most likely to reveal what has been going on. 

Behold this powerful online communications tracker tool.

Enter a few of your girlfriend’s basic details into this tool and you’ll discover who she’s been contacting most frequently. 

On top of that, you’ll see what apps she has been using and what online services she has signed up to. 

And that’s just the start. You’ll receive a lot more data about her recent communications on top of that. 

If your girlfriend has been playing around, this tool will reveal the evidence. (Hopefully nothing incriminating pops up and you can continue with a happy relationship). 

It’s important to mention that this process is completely discreet. There’s no way she’ll find out that it’s being used on her. Meanwhile, you get the peace of mind of knowing what’s going on when you’re not around. 

The clues below will reveal whether you have a good reason to be suspicious of her behavior.


How To Spot A Cheating Girlfriend

Is your significant other acting all strange lately? Is she giving you reasons to doubt her fidelity, but you can't seem to decipher what has gone wrong? Perhaps she's cheating, but you don't have any basis for accusations. 

Here's the thing, cheating partners are always sneaky, and many of them can be pretty good at covering their tracks whenever they sleep with someone outside their relationship. Though they may feel like they are sleek and discreet, people make careless moves from time to time. 

If you could just be extra attentive to look out for some signs your girlfriend just slept with someone else; you might just be able to figure out if she has compromised the relationship. 

If you are interested, let's not waste any more time as we dive into these 43 signs that'll help you figure out if your girlfriend just slept with someone else.

43 Tell-Tale Signs That Your Girlfriend Slept With Someone Else

The Amateurs

1. She'll avoid you

If she's just coming from one of her cheating expeditions, there's a huge chance coming close to you will seem a little difficult for her. If you are the type that hugs or kisses your girlfriend whenever she arrives from work or any outing, you have an advantage here. Notice her reaction; she won't be too psyched about being affectionate.

2. She's quieter

Amateur cheaters may feel guilty immediately after their affair outside the relationship. If your girlfriend isn't naturally an introvert that keeps to herself half the time, then being quiet is a good sign she was up to something earlier. On such days, notice you may have tried to reach her on her cell phone without success. 

3. She may even avoid sex

All things being equal, sex makes people a little tired and satisfied. So the chances are, another sexual encounter won't be on her to-do list if she's been with another man. Make a move once she comes in; her reaction will tell you a lot. You'll notice a huge "I'm not interested" vibe that's not usually there.

4. Nervousness

Apart from avoiding you, nervousness is one sign cheaters can't hide, mostly when they've just done the deed with someone else. The guilt makes them all jittery, which will make little things spook them. Ask them in a loving, "how come you arrived later than usual?" You'll notice how nervous she'll get to answer your question.

5. She can't look you in the eyes

she can't look you in the eyes

If infidelity is a new path for your girlfriend, chances are, she won't find looking into your eyes easy. Research shows that people find it difficult to maintain eye contact with their accusers when they've done something wrong. Just give her a suspicious look; if something is fishy, it will spook her instead of exciting her.

6. She's not just her usual self

People use unusual behaviors as a defense mechanism to throw people off their real motives or intentions. If you notice overzealousness that isn't her usual character, it could be a sign of throwing a smoke bomb to prevent you from suspecting her.

Wondering about your man? Let's find out who he really is.
From the newly dating to the happily married, trust issues can creep up on anyone. With cheating cases soaring over 40% in the last two decades, it's natural to have your doubts.

Could he be sending flirty texts to another woman? Or secretly swiping on Tinder? Or even have a hidden criminal past? Or, the worst fear - could he be cheating?

This useful tool can bring the truth to light. It'll dig out hidden social media accounts, dating profiles, photos, any legal run-ins, and more. Let us help clear your mind.

7. She comes in with a funny smell

There's a way people smell after sex, maybe you don’t notice it after you’ve made love to each other, but it’s a hard smell to miss. Things like this can’t easily be explained or denied, she would have to come up with something really creative if she denies getting some action outside the relationship.

8. Her clothes may look untidy

The way her clothes look could tell you what kind of things she did before coming home. You are a guy; I'm sure this tip shouldn't be hard for you to adopt. 

If she's wearing a light-colored cloth like white, yellow, or pink, you'll probably spot some signs of stains around the area due to foreplay. Don’t let things like this slip, use them to your advantage if you feel like there's a need to end the relationship.

9. Her hairstyle looks different

If you are looking for signs your girlfriend just slept with someone else, you might need to pay attention to her hair when she's heading out. There's a huge chance her hair will either be slightly rough or newly restyled. 

10. Her lips no longer have lipstick

You'd probably agree kissing is a very common part of sex. If your girl has just been with someone, you may notice her lipstick is smudged and has found its way off her lips to maybe, her cheeks. It's a careless move of amateur cheaters since it's not a routine yet.

11. Rough makeup

Another careless move your girlfriend could make is rushing back home with a completely untidy face after the sex romp. Naturally, it couldn't have been her style, so because it's not yet a routine for her to cheat, forgetting to touch-up is possible.

12. Fresh perfume

Now, your girl may be a perfume addict, and she'll always apply afresh before she leaves anywhere. Still, it could be a red flag. It's one of the things people do to mask the scent of sex.

13. She initiates a new sex style

she initiates a new sex style

If you've been in a relationship with your girlfriend for some time, there exists the advantage of predictability on your side. No matter how spontaneous and adventurous a person is, it's not uncommon for sex to follow a routine most times. Suddenly initiating a new style or move might be a sign she's been with someone else. 

14. More outings without you

It's only natural for a girl getting more sex elsewhere to go out more without you, the boyfriend. It's not a hard sign to spot. If she's not available on her off-work days like she was before, then she's probably sleeping with someone else already.

15. She has a sex finder app

No faithful girlfriend has a sex finder app. It's a sloppy move, but that's what happens to cheaters eventually when they think no one is watching them. 

16. She lies about her whereabouts

Don’t see her as your ex-girlfriend yet until you catch her in a web of lies. The truth is, some ladies are very strategic fibbers, but it would take magical powers for them to equally change how things actually happened. So, let’s say you paid her a surprise visit at work, but she wasn’t there, then she gets back and swears she had a busy day at work, there you go.

17. Mobile phone signs

Amateur cheaters can be sloppy with their phones after cheating. Chances are, the other guy might want to text her about how great the sex was. Snoop around a bit for such illicit text messages if you have a gut feeling that this is happening.

18. Body language signs

Your girlfriend may successfully throw you off her cheating trail with her words, but her body language will likely give her away. Look out for signs such as brushing her hair before answering your questions, pretending to be busy, and too much blinking. 

19. You notice she's frequently lost in thought

Unlike men, women are not pros at compartmentalizing when it comes to cheating. A cheating girlfriend may be lost in thought frequently because she remembers the sex she just had a while ago. If you notice it happens after an outing and she's not sharing, that could be a sign that she just dishonored the relationship.

20. There's always a generic excuse 

In combination with coming in late, if you notice your girlfriend always gives generic answers to your questions, she's probably cooked a ready-made solution to keep you quiet.

21. New habits

When your girlfriend has just slept with someone, there's no doubt you'll be seeing strange habits such as being overprotective of her phone, mood swings or being defensive for no reason. 

If you feel she's just returning from a cheating trip, ask her unexpectedly and calmly for her phone. Pretend you need to call your cell, if your suspicions are right, a reaction will be a mix of defense and refusal. 

The Advanced & Legendary Cheaters

22. Her after-sex pills run out faster

This area is uncharted for most men. But if you want to catch a pro, you have to know the number of tablets she uses after sex. Keep a tab on her usage after having sex with her. If she is sleeping with someone else, an ‘audit report’ will expose her.

23. Lookout for condoms

lookout for condoms

Cheating partners don't think of the consequence of their infidelity, but they do play safe. If your girlfriend uses condoms with her side-boyfriend, she could have unused condoms in her bag. 

You can also bait her by keeping tons of them in the house. Trust me; they can be sloppy enough to pick out of your condom stash on their way out to the cheating appointment. Again an audit report will help you here.

24. She's not excited in bed

If it has come to the point where your girl seems to enjoy the man outside better than you, you'll start to notice a significant drop in her bedroom excitement.

25. She suddenly complains about sex

Complaining is another sign she's been with another man. No offense, but the guy may be better than you at the game. Not only will she complain because she's not enjoying you, but cheaters are also manipulators; they always want to make you feel their infidelity is your fault. 

26. Sexually uninterested

This sign is common with pros and amateurs. The chances a woman wants to get down with you after a prior hot session with another guy is pretty low. If she's always saying no to your sexual advances anytime you suspect she's cheating; then it's a cheating red flag. 

27. She grooms herself too well

As I said, you need to know your girl for you to notice differences. If your girl is going out to cheat, there are chances she'll groom herself. She might shave her legs and do every other pre-sex ritual women do. If you notice it's getting too much and the sex isn't equally increasing at home, dude, something may be off.

28. She goes AWOL

Another sign common to all cheaters is the disappearing act. While this vanishing can be for hours or days, one thing that's common is they won't let you know where they've been. Many times, they just go radio silent and later show up as nothing happened. 

29. She comes in late from work

If you know your girlfriend's schedule, you'll likely know how long it takes for her to get home from work. A secrete engagement like a sex appointment after work will definitely add to the time. If this scenario is frequent, something fishy is going on.

30. She wants to shower immediately 

This move is the alternative to masking the ‘sex smell’ with perfume. If you notice your girlfriend avoiding you by heading straight to the bathroom, that's a classic evidence-eliminating move. That way, you can't smell her or see any roughness on her clothes. 

31. Fresh lipstick

fresh lipstick

Engaging in some lip-locking action will naturally wipe lipstick. Unlike amateurs, advanced cheaters take their time to add more lipstick. That's fine; it's a red flag for suspicion if the lipstick looks too fresh.

32. It’s deja vu

Most of us have been in a relationship where someone cheated; either you or an ex-girlfriend. So it would be easy for you to see the signs if an ex-girlfriend has pulled the same stunts before. There are really no new tactics in this game of cheating, especially when you’ve seen the way this plays out before. 

33. She buys you gifts

Legends hardly get defensive or jittery after returning from a sexual encounter with another guy, 

They'll even buy you a gift once they notice they've gone AWOL for some time. The gift is another form of attention-deflection strategy.

34. You find digital receipts

No one is perfect when it comes to cheating; they'll eventually get careless and get caught. It's not common for pros to leave paper trails of their hotel or restaurant visits. Digital receipts are sent by either email or text. This sign could be a good way of knowing they are seeing someone outside the relationship.

35. She made trips to unknown locations

Cheaters generally go to great lengths in covering up their tracks. If they visit a hotel to sleep with a man, it's likely a location where close friends can't identify them. Since many mobile phone devices have location services, you can see their location. A secret visit to an unusual location is probably a sign of a sexual appointment.

36. Digital footprints

Advance cheaters aren't stupid to leave browsing history if they use online dating services. Because they don't want you to know, they'll use the web rather than the app and clear the record. Yet they could leave some communication trail on Instagram or other platforms you aren't friends on.

37. Mobile apps & nudes-sending 

It's a common habit among cheaters to send nudes. However, advanced cheaters can use special services like KeepSafe to ensure their activities are safe. The presence of those apps can be a strong sign she's hiding her sexual escapades. 

38. If you find a second phone

If your girlfriend or significant other has an active second phone you don't know about; it's a pointer someone may be sharing the sheets with you. Cheaters keep such extra phones in personal cars or other spaces exclusive to her.

39. Intimacy reduces

Unless you are dating a girl with an incredibly high libido, the frequency of having sex with you will naturally drop. If she's been with a man, it's one of the first few sings you'll notice

40. She calls you another name

It's not common for women to employ male prostitution services just to cheat, so if she's sleeping with someone else, it's likely someone she knows. E.g., a colleague, a gym buddy, or anyone she has a ‘casual’ relationship with. If on occasion, she slips up and calls you her cheating partner’s name, that’s another disheartening sign.

41. She sticks to pet-names

I met a legendary cheater who claims she uses pet names for all her boyfriends just to avoid mixing up names. Pretty sneaky right? When you notice the pet-names aren't particular, she's probably all over the place and only trying to play it safe.

42. The attention reduces

the attention reduces

Unlike men, women are not pros at compartmentalizing when it comes to cheating. If she's sharing her body with another person other than you, you'll likely feel the heat. 

43. She gets carried away during sex

If she gets carried away during sex and tries something that's not your thing as a couple, it's probably a move she did with the other guy. 


Can your partner tell if you slept with someone else?

Yes, for a very attentive partner, some signs can show you slept with another person. E.g., people have successfully smelt sex on their partners. Some women use fresh perfume or new makeup to cover their actions. All of these are signs to expose a cheater.

How do you know if your girlfriend slept with someone else?

It's natural for a woman who has slept with another guy to avoid sex or avoid looking you in the eyes due to guilt. What's more? A lady who has just gone down the unfaithful hole will likely be nervous and unsettled if confronted by her man.

Can you love someone and sleep with someone else?

The matters of the heart are quite complex. Love might not be enough to prevent a person from cheating. It takes self-discipline and a personal decision not to walk the infidelity route even if faced with strong temptations.

How do you know if a man has slept with another woman?

If he doesn't shower after sex, his genitals will likely smell like latex from a protective condom or some other strange smell if he did it without protection. If you confront him not too long before the sex, he may have less interest, which may be strange if he’s always up for good sex.

Do you really love someone if you cheat on them?

Because humans are capable of sexual activity without being in love, they can have sexual feelings towards another third party while they love their partner. It may result from neglect in relationships, desire to explore or relive missed opportunities, a pornography addiction, midlife, crises, and more.

On A Final Note

I hope you enjoyed the article. Note that there are legendary cheaters; sneaking around and covering their trails is exciting for them altogether. So you might need to be more crafty to catch them. Infidelity is not cool; it could leave the victim paranoid, making it difficult to trust again. For the sake of your mental wellbeing, it's best to find out and move on to a better relationship before worse happens. Please leave a comment below and share this article if it was helpful.

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Whether your relationship is in its budding phase or you're in the blissful realm of marriage, escalating infidelity rates (over 40% in the past two decades) warrant your caution.

You may want to ascertain whether he is engaging in secretive text conversations with other women, maintaining active profiles on dating platforms like Tinder, or concealing a criminal history. Or you might be fearing the worst - infidelity.

This robust tool is designed to uncover hidden social media and dating profiles, unseen photographs, undisclosed criminal records, and much more, providing you with the clarity you need.

Michelle Devani
My name is Michelle Devani, and I've been helping people with their relationships since 2003. In 2017 I decided it was about time I started a blog on the topic, and since then more than 2 million people worldwide have read my relationship advice. Drop me a comment below to let me know what you think.

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