Hi, I just wanted to say thanks for the links and discussion of my blog, Chump Lady. It's neat to find you. Per the question, are you crazy to stand there and take it if a cheater wants you do to the "pick me" dance? IMO, yes, sorry. Yes you are. Marriage is not about humiliation and requiring competition to ensure "monogamy." The whole dynamic is abusive. The only response to discovery of an affair from a cheater should be, I'm sorry -- I'm ending this marriage. OR I'm sorry I'm ending this affair. The middle ground is cake. Manipulating your spouse into competing for you (doing the dance of "pick me!") is getting ego kibbles at the emotional expense of someone you've devastated. It's totally $h!tety.
I could go on... I do... on the blog. You matter. You're worth more than taking that crap.