When I was dating my wife she wanted to tease her sister so we started out making out and I ended up fucking my wife on the couch. We finished and saw her sister with her shorts off shirt up watching us and fingering herself. Wife told me it went farther than she planned and since my dick popped back up she told me to fuck her sister and make her cum. I did and SIL was a really good fuck. Wife told me it was a one time deal. Nope it wasn't I fucked many more times. I don't know which one told but word got out with her other sisters and it led to some very intense teasing. When her younger sister turned 18 I was 21 and I got to fuck her as well I'm pretty sure I took her cherry. Yes all my SILs are sluts