Why is this happening?

So my cousin lost her virginity at the age of 15, during the process of loosing her virginity she lost a lot of blood. There were puddles of blood on the floor and huge blood clots, she was rushed to the hospital and they did some kind of surgery in her, the doctors also mentioned that he vagina resembles a 10 years old's she's not fully de veloped. A whole situation happen with her then-boyfriend simply using her he wasn't there through anything and showed off the fact that he "killed her vagina". Well now she met a new guy and shes almost 17 so we all assumed that was gonna be a one time thung and when her and her boyfriend had intercourse she once again bled out to the point where she flat lined at the hospital for approximately 1 min, she came back and they again performed the same surgery on her. The thibg is we aren't being told the name of this condition she has and if there are treatments. Does anyone have an idea what this can be?