[Isabelle]

You are right, it just doesn't add up. I'd chalk it up to power play. She has power over him. He breaks that power by suggesting something, if she goes along with it. He tells a certain version of that story to his friends, and goes up in the pecking order. Then he gives you a certain version, thinking that will give him power over you.

Teach him a lesson. Did you see "Bitter moon" with Hugh Grant? It's a good how to. It shows why a woman always wins, once power play starts in a relationship. Watching the movie with him may be enough, if he's smart.