I’ll never understand how someone can find out their partner slept with someone and their response be to literally kill someone over it, when I was in a long term relationship I figured out pretty quickly I didn’t care if my partner wanted to sleep with over people, I just wanted to know they were safe while they were doing it, beyond that I don’t really care, only time I care is if they start dating someone when we agreed not to have a romantic relationship with other people, but the only time I’d be upset about them sleeping with someone would be if it was a family member tbh, but maybe I’m just not a very jealous person