What would you do?

[Matt]

Imo it depends how well he knows your gf, perhaps they were very good friends and he hasnt seen her in a while. The fact is she shrugged him off which was all that was needed.
Because it was her that shrugged him off and put him straight then the guy must feel alittle small, i know i would. If you would of hit him then he's got what he wanted, a reaction from you. Thats to say he knew you were with her.
Women can stand up for themselves, let them do it...

[LAW]

Imo it depends how well he knows your gf, perhaps they were very good friends and he hasnt seen her in a while. The fact is she shrugged him off which was all that was needed.
Because it was her that shrugged him off and put him straight then the guy must feel alittle small, i know i would. If you would of hit him then he's got what he wanted, a reaction from you. Thats to say he knew you were with her.
Women can stand up for themselves, let them do it...

I totally agree. She stood up for herself and you her boyfriend and that's all that was needed.
As far as touching brother/sister like, I think it is a thing a lot of girls/women do and I know Im guilty myself but I never cross the line when im in a relationship, im in it and all the so called flirting with my "brother" doesn't mean that Im going to stray. Controlling her by not allowing her to be herself is not the answer. She is with you because she wants to be. Don't read to much into that behavior

[PittBoy]

I totally agree. She stood up for herself and you her boyfriend and that's all that was needed.
As far as touching brother/sister like, I think it is a thing a lot of girls/women do and I know Im guilty myself but I never cross the line when im in a relationship, im in it and all the so called flirting with my "brother" doesn't mean that Im going to stray. Controlling her by not allowing her to be herself is not the answer. She is with you because she wants to be. Don't read to much into that behavior

I also agree about not controlling who she is and allowing her to be herself and should have expanded on what I was saying too. I wouldn't give an ultimatum or anything like that but again let her know if it is bothering you and why it is bothering you. Just putting it out there helps a lot. If she had a problem with something I was doing I would want her to let me know too. Not saying anything and letting it bottle up isn't going to do anyone any good either.

My wife is still the outgoing friendly wonderful woman she has always been but I think she is also a little more careful with how she reacts to other guys.

I don't know this guy and he could be harmless and just wasn't thinking but I have ran into guys that have done that on purpose for whatever reason so just be careful.