What do you do,if your girl friend sleeps with her ex bf?

Find out why.

Sleep: Well there can be an explainable reason for this.
Sex: I would be upset and figure out what was up.

I hate how ‘sleeping with someone’ is so commonly used to mean ‘had sex’

@Syger it’s just another euphemism, I think Althaf means “had sex”.

And to answer, I’d probably break up with her. Not so much for the sex itself, but because it would be pretty obvious that she still has feelings for that guy, and therefore our relationship is doomed anyway.

Find another girl.

Live to tell the tail .

dump her immediately.

Kindly show her the door… with a boot up her arse.

@NaturalMineralWater Maybe she likes that tho , thats maybe why they aint together

Make her your ex gf.

Dude: It looks like she doesn’t believe in ex-bf’s. Remember that for future reference

I would think that her ex-boyfriend is not her ex, but her boyfriend, and get out of that triangle.

I’m wondering how you found out? Did she tell you? I’m leaning towards breaking up with her.

How is he an ex-boyfriend? Does he no longer take her out on dates, or spend meaningful time with her or provide emotional support? Seems to me this girl likes having more than one boyfriend. If it were me, I’d dump her, but if you are comfortable being one of many and sharing the girl’s attentions and affections with other guys….well, good luck. See ya….Gary aka wtf

uh, break up with her? she’s cheating on you, no excuse.

DTMFA

Stop seeing her.

Walk away.
I wish I had known to do this several times in my life.

@Althaf welcome to fluther. Lurve

I don’t want to be harsh because I know this is painful, but I think you should break up with her. Having sex with someone isn’t an “oopsy!” like forgetting the 4 month anniversary of your first movie together. Don’t give her a chance to do it to you again.

Run! Why the flip would you want to go out with someone that doesn’t like you. She’s sleeping with her ex.. Maybe it’s because she loves him more than you. Wow! I sound really harsh, but welcome to reality!
That is really mean of me! I feel like such a witch today.

What does gf mean to you guys? Did you explicitly say you were going to be exclusive with each other? Did you make any other promises? You may have assumed certain things, but unless you explicitly promised them to each other, she may have a different understanding of where your relationship is at.

You gotta talk to her to find out what it meant to her. Then decide if she’s someone you want to stay with or not.

I’m with @daloon on this: what are the terms of the involvement? If two people mutually agree to be physically exclusive then there is a breach of trust and this situation is a no-more-nookie-go-go.

Get a sleep doctor involved, they could have a disorder.

i would just talk to her and try to get the whole story. Fundementally people can’t understand someone else so just try to understand and make your mind after