There’s something so awful and tragic about a woman getting her esteem boosted by a man ridiculing a woman that trusted him in such intimate fashion
Yes, it is saddening, to glorify and enjoy his mocking of her. And it’s highly distasteful for him to do so, I simply couldn’t stomach that. But some women need it, they need to feel they won. And want to see the other woman belittled by him.
Which makes me think this is hysterical bonding for the op. She’s basking in the winning and relief, she sees him as desirable now, because someone else wanted him, and when the adrenaline has gone, when the mundane has arrived back she’s going to look at him and see not just a lying cheat, but the kind of pure scum who would cause a woman such distress then mock her for it.
The op will also know she has no room to assume anything but he was doing the same about her when he was alone with this other woman.
The things he would have told her. No woman sleeps with a man who says I love and fancy my wife and I’m never leaving her. They sleep with him because they believe the bullshit he’s been spouting, about how it’s over, that he’s just there for the kids, how she makes his life hell, she’s let herself go, , how unhappy he is. All the things he needs to say to get her naked. And keep getting her naked.
And then when she’s devastated about his lies, and she reacts terribly to her treatment, tries to seek vengeance, he mocks her openly. Laughs at her. Whilst his wife laughs along and believes what he says.
It’s as low as it gets, I certainly would not ever be with such a man. As said, for me this behaviour is worse than the actual cheating. Because if you’re going over the side the least you can do is be a man about it. Own it and have some fucking respect.