I am about to explode on this girl for doing this with guys

ok I have 3 of my best friends in my class and one of them her name is lynzee has a friend that is in another class her name is kait. and kait has been going around for a really long time and going out with any guys she passes. basically. and we went to a roller skating rink th eother day and kait didnt even know this kid and she started making out with him and then they went into the locker part of the rink… and she took her shirt off and everything. but didnt take her bra off. antoher thing that happened the other day was… we were at a resort and she didnt know this kid once again and she started making out with him but worse then that he fingered her. and she gave him a BJ. it was horrible! and she has been cheating on EVERY boyfriend that she has had and I know she found a guy that really really likes her. but she cheated on him and I am about to EXPLODE on her. because he was one of my best friends.