Pegging adventure...

My wife and her boyfriend want me to peg him, I've worn the strap to fuck her but never another man. He said he sees how much I enjoy being pegged and wants to try it. He wants me to peg him while my wife watches. She's watched him fuck me several times but this will be a new adventure. We are meeting him this coming weekend, I'd say we will all be enjoying ourselves in a new dynamic. As always Ill be locked in chastity, I'm hopeful I'll be getting pegged too at some point or he will be doing me.

Anyone had this in your arrangement?