This is just a thought, here, but I don't think that the OW IS completely satisfying your H's sexual needs. If that were really the case, he wouldn't be on the phone with you for an hour talking fantasies and reminiscing about the time with the paramedics (which I would love to hear about, by the way). You know, it's not all just about what she's willing to do for him: for it to be really good, there has to be another kind of connection beyond just the mechanics of it. And that connection he has with you.
Yeah, he's satisfied, because he's got two chicks and he's living the life. His ego must be swollen like a blimp and floating up above the clouds somewhere.
But you two sound like you had a really good chat, friendly, and sexy. There's no doubt in my mind that he doesn't want to let go of you. The problem is that he doesn't want to let go of OW either. There's probably nothing very special about her at all. She's just someone different, a novelty, and a huge ego boost for him.
You're staying friendly, and doing great. There'll be setbacks, but you two seem like you really understand one another. For a couple with three kids, you sound like you had one very hopping love life. He's got to miss that. Bunch of BS about what you will and won't do. He's got to know he had it good.
