Wife Fucking Without You

I met “the Marine” when they fucked the first time. He was also married and could only get together during the week. She asked they could meet alone. I wasn’t a fan of that because I wanted to be part of it, but I relented. Once alone they started things I didn’t know about, but found out later, sex without condoms, setting up a meet and not telling me, telling each other this is your cock, or this is your pussy, she became pretty private with her adventures.
I got to setup the hotel (big deal) and know when they were fucking. And he’d email me with some details, but not the really secret stuff.