Carter Cruise, Riley Reid (A Very Intimate History)

Riley has invited her best friend from college over to stay with her for the weekend. They intend of catch up and have a couple of days of fun planned. They have always been very intimate and nothing has changed. During some mutual fantasising together they admit they would love to share a man and the next morning, when Carter catches Riley and her boyfriend having sex Riley gives her the go ahead to join in the fun. Best friends always share everything, right?