I can understand where you're coming from butI can give you some words and some advice and maybe a scenario or two. First yes it does suck but just think if she enjoys you doing the same thing with her it might be that it was good thing she had that experience with (we'll just call him "no more") now no more more then likely was not a good thing for her. She might have or might not have enjoyed it. But that's something that comes with these scenarios. Maybe she enjoyed what she felt but not who it was. OR everytime it was brought up she noticed you being upset by it and tried the different road and said she did enjoy it to see if it might've been easier for you to handle. The main thing is YOU were her first. That's something that no more could never experience or share with her. All he got was a hand job and you a man she actually cares for got to experience something she can never share with another man. Just don't dwell too much about it I know it's hard not, but everytime you start to dwell on it instead of bringing it up or asking her about it just grab her kiss her and YOU do what you are dwelling on about you touch her and you ask her what she wants you to do what feels good for her and focus on that instead of no more and her. Turn the dwelling negative thing into a positive and constructive thing that you can begin putting better positive memories and thoughts in its place with. If it's about what she did then just think back to the above statement about what you got to experience with her what he didn't.