Show, I am not on Sam's side because she is damn stupid. I'm thrilled that Delores would have burned her life and her lover's life rather than give into Sam's blackmail attempt.
I don't like Nelle but if she doesn't want to sign off on the surgery, I was fine with it. I actually do think that she is concerned and doesn't want Wiley to be cut open if she could avoid it. Of course, she didn't help her case when she said that she googled stuff on the internet and wanted to find alternate ways but refuses to listen to the experienced cardiologist and dismisses any referrals that Monica was trying to give her.
Wiley is 2 and he isn't in any immediate danger. There is enough time for Nelle to do real research and get a second opinion.
Now if Wiley is rushed to the hospital again because he is not breathing and she still refuses to even consider the possibility, then that would encourage Michael even more to go for sole custody.
Both Wiley's parents are too stubborn and dumb for his own good.