Hehehehe... Am surprised your friend sarah, really let matters slide like that. Something similar happened while i was in school too. The girl wasn't a friend or let's say i was course mate's to the one who committed the crime. These girl in question, had just one roommate who hardly attends lectures, and this course mate of mine too the opportunity and wear er roommate clothes down to her panties...
At the end, when her roommate found out, she and her gang stripped and beat up my course mate naked on the outside, and that was how d video went via... Things are really happening sha.. I guess your friend just gave her last respect for that friendship deciding to end it in a lowkey way.