My best friend has snuck round while I was at work to try to seduce my husband as her hubby is useless.  After teasing him with her tits he agrees and she sucks him hard.  They don't know I have come home and I am watching through the doorway.  Before it goes further I confront them.  My best friend convinces me she is sorry and would like us to do something together.  I confess we always talked about having a threesome.  Best be with someone we trust....