I am at a loss.
Recap of past:

DH had a baby with Moosecow, court ordered CS starts & EO Sunday supervised visits in her home for an hour supposed to take place.

Moosecow made it very difficult for DH to see the baby.
DH gave up after several months.

Two years ago (baby then 4 now known as Wonderchild) Moosecow decides she needs a break eow end. Court order is not changed to reflect this verbal agreement.

Moosecow starts asking questions about me, such as my maiden name.

I make the fatal error of befriending Moosecow, to ease her curiosity.

This doesnt work out so great for me (getting treated like a free Nannny) so I unfriend her after a year.

Wonderchild gets interrogated after every visit until Moosecow is satisfied with
something she can complain to DH about.

Nothing DH does is good enough, Wonderchild is perfect and never lies, Moosecow makes sure Wonderchild knows that her Father is a POS.

Pickups get worse & worse with Moosecow making a HUGE production & slobbering all over Wonderchild as she screams her head off only to settle down when promised a gift when she gets home to the Moosecow for going with Daddy.

Wonderchild seems fine once here but cant wait to go home to get her gift from Moosecow.

Holloween was DH's weekend, no visit takes place.

The next weekend he was supposed to have Wonderchild, no one home at pick up time.

The next weekend DH's Mother dies, on that weekend Moosecow decides to call wondering why DH didnt pick up Wonderchild. He does not take Wonderchild that weekend.

Moosecow calls DH wanting details regarding his Mothers death.

DH tells her he is upset & doesnt want to talk to her.

Wonderchild calls a couple of days later with Moosecow in the background guiding her on what to say, five messages are left in one hour all with Wonderchild repeating what Moosecow says in the background (Wonderchild has never called before).

Moosecow calls & leaves a message saying DH needs to pick up Wonderchild this weekend.

Soooooo, I suggest to DH that he call Moosecow. He says no. He says he wont be taking Wonderchild anymore. He says if he is such a POS father then its better he is not involved with Wonderchild. I try to suggest he at least take her one day on the weekend & he got very angry with me. He does not want to discuss it at all or even call her.

This will land up in my lap. Moosecow will show up at my door during the day when DH is at work she has done this before. Most likley this Friday (her day off). I just dont know what I would say. Last time I had to keep the door semi closed with my foot as she is very pushy trying to shove herself in the house.

I think some of his attitude is from his Mom passing suddenly. His Mother was disgusted with Moosecow, also Wonderchild would not call MIL Grandma. Moosecows Mother is the only Grandma. I also think he is just plain angry right now.

Not to defend Moosecow at all, but her Mother was a single Mom who was is deeply bitter. This is the only way she knows how to parent. She was turned against her Father growing up.

This is such a bad situation, so frustrated at how complicated people make life.
What to do?

Sorry about typos my "perfect" 3 year old picked half the keys off my laptop lol.