The two boys

One of the many stories my girlfriend tells me about her past was her fucking a 16 year old when she was 28. It was 6 months before we met. She says he started getting very clingy and "in love" right before circumstances ended it. She says knowing there was a time limit helped her convince herself to do it and the timing was perfect right before whe felt like things got messy and she got in trouble. This was 11 years ago.

This post lacks details and so raises a lot of questions. You say she was mid twenties how old were the boys? It makes a difference if they were 14 vs. 18!
You say "even sucked their cocks," does she not suck yours? If she doesn't suck yours now would be a good time to work her into it! As for the threesome aspect of it, she was drunk and drunk people tend to let inhibitions fall by the wayside! She sounds very sexual, appreciate that now or you will wish you had later! She did it because she was horny! If you don't want her to suck you and have a real problem with what she did before you were together, when it something as mild as a drunken threesome, then you are a prude and for the love of God what are you doing on this web site???

Only thing she has done wrong is being daft enough to tell you.

Lol,If she did it good for her,As a real world man i can never get this bullshit and double standard that a man can fuck countless women yet a women gets called a slut.

Because she a fucking slut.....

Great for her, a lifetime story for the guys.

What should you do? 🤔 NOTHING! What can you do? Build a time machine and go back and stop her?

Easy for you to say. You’re into teenage boys.
Fucking them is your idea of normal.

It was before you. What does it matter? Besides, you need to ask her, not a bunch of internet strangers