I like the idea of praying for the OW. That shows a generous spirit. I'm afraid I'm not quite there yet, but I'll give it some thought.
I like your style of DB'ing. It doesn't seem to be straight from the book, mind you. For instance, you pretty much say what's on your mind, just as feisty as you please, and your H doesn't seem to dislike it. He seems to like a good knock down drag out. You've got the jealousy factor working for you, too. You're definitely doing something right in that area. I don't know what in the world he's doing having an affair, when he's clearly so attracted to you. Your sitch is different from so many others, because there is tremendous jealousy and attraction, as well as possessiveness, on his part. Sometimes it seems that the OW has turned into the wife (now she's the one who likes to sit around with the guys watching sports?) and you've become the girlfriend. I bet he's totally confused.
Even if you don't send him your bathing suit picture, I hope you won't miss any occasions for strutting around in it in front of him--in the most casual and innocent way, of course. Sun bathe with the straps down. All very wholesome.