To me, this could have worked better as a two parter, for the simple reason that we never really explored WHY Linella wanted Penny back. But, as the episode goes on, we see she really only wanted her back because she lost her. It wasn't about Penny, it was more about proving Wilona was unfit. Linella had not changed at all, except now she apparently married into money and could solve her previous "problem" of the child "wanting things". If you have "things" but not love, you really have nothing. And, Penny knew who really loved her and who she wanted to be with. Even if the case had gone to court, I'd like to think a judge could clearly see who Penny was better off with.