I wouldn’t do it. What you did sucked but sucked in proportion to your age and how much you still had to learn. On the other hand, she is still with this man. It is absolutely possible that he has grown up, all is well and the three of you will have a good laugh. It is also possible that things are as abusive as ever and you’ll set of something bad. My advice is to reignite the friendship and see what’s going on before you bring up how abusive you thought her man was in high-school.