Hummmmm.... probably the best "revenge" for OW is to DB and make sure H has such a pleasant time living with you, he can only further regret the idea of leaving.

Since you can't kick him out and have to live with this sitch, you may as well use it to your advantage. Now that the weather is heating up you need to start wearing less clothing. Expecially when OW is nearby. In fact, invite her over (for dinner) so you can all be one "happy family" and she can see you (the perfect cook and hostess) with cleavage down to your navel!!!

And that way when she leaves she knows he's with you and your cleavage!!! Oh boy!!! If I were in your shoes I'd have fun with this sitch!!!

There is no arriving, ever. It is all a continual becoming.