Why is screwher and Roger not tag teaming her?
First and foremost everything is contingent on Mrs. Screwher's comfort. She's just not ready for me just being in the room when she's getting naked with Roger. I also don't much thought to me being in a threesome with my wife. Whenever I do think of it I imagine my wife with two other men. Or another married couple.
The first step, after some preliminaries, is to being watching as Roger fucks her. That's another hurdle - Roger may not want my presence while he's screwing her. That may very well have to wait for the next guy.