Thanks E, yes it does help. I think it may be true that the worst part was the beginning of the MLC, but the behavior is old. It's like living with a 5 year old. After a while even my son made fun of him, which was not nice. At first I would take my son aside and tell him I did not think his behavior was very respectful, but after a while I thought, this is not my job, my H should stand up to his son and demand respect for himself. He never did. He would actually whine and complain. I have to say (in the words of the DB couch) there is nothing attractive about a 53 year old man that acts like a child. My son finally outgrew his Dad.
Unfortunately, what happens is you become MOM...good or bad. I hate it. My H and the OW slept in our bed when I was out of town. I found this out later. The two of them promised never to tell. Of course she screamed it out the day she came to break our windows. I felt like they were two teenagers having sex in their parents bed, then one gets mad and rats the other out. Uck!
So I guess its time to wean him. Then he and the OW can play together in the sandbox.