There are more holes in that story than you can imagine. One - the girls live with him! I would think that would make his divorce harder than appearing on a show. Whatever, the bottom line is that Melissa should have handled this like a big girl and said to those nasty women (and I do not like any of them) that he does not want to be a part of this show so do not discuss him. That is how an adult would have handled this situation but I've long since stopped viewing any of these women as adults. Every single one of them are just pieces of work and should be ashamed of themselves.
All that being said, I adore their children and I feel sorry for Abby having to deal with those women. If I had to on a daily basis? I would be hard pressed not to act like Abby as well.
And to answer to the comments on the show about Maddie being better because she gets more practice? Then pay for more lessons! Duh! That is what annoys me the most about these women. They whine and whine and whine but then they aren't willing to pony up. Abby spends so much time with Maddie because her mothers spends so much money. She knows where her bread is being buttered and is taking care of that money source. I bet if the other mothers paid for as many lessons as Melissa does, they would get more attention as well.