It was a planned MFM, your wife chose the guy from the messages he was sending back and forth with you as you were vetting men for playtime. Your wife liked the way the guy wrote and the pictures he sent.
Well we you got to the hotel and your wife signaled she was ready, there was some kissing and sucking. She then got into the doggy position. The new guy went straight into her ass. And she let him. They must has talked during the kissing and she wanted it. She tells you right there, "He's going to cum in my ass, when he's done, I want you in my pussy".