My Mistress was out with her girlfriend Sarah, who knows about our lifestyle, and Sarah mentioned her new boyfriend is bisexual. Clearly seeing an opportunity, Mistress has decided it will be a good time for me to lose my true anal virginity - I have been taken by plenty of strapons but never actually had a guy fuck my ass. Sarah enthusiastically agreed and the boyfriend has tentatively agreed to giving the girls a show, but he wants to meet first and get to know each other. So Friday, Sarah and the boyfriend are meeting us for drinks and dinner. Mistress already informed me I will offer the boyfriend a blowjob in front of the girls to make him relaxed. If everyone gets along, we will all go to the shore together for the long July 4th weekend. At some point during that weekend, Mistress and Sarah will get their show. As a thankyou, Mistress and Sarah will have a threesome with the boyfriend. Clearly that weekend will be full of sex, I just hope Mistress brings the key so I can partake more than just with the boyfriend. If I am good, Mistress has told me I will get a non-ruined orgasm possible even a full orgasm from penetrative sex.