This seems even worse than that the Landon Collins thing back in 2012, because other than his mother's on-screen display of disgust, Collins ended up at Alabama all the same. I rather feel bad for McDowell because his decisions on his future are taking a back seat to a lot of unnecessary drama like this. I dare say that this seems rather selfish of his mother (without knowing the specific reason she objects, it is hard for it to look otherwise, in my opinion), and that's very unfortunate that McDowell's future is still not certain because of it.
Yahoo! Sports ran a nice piece with some background quotes here - (LINK). I sincerely hope this gets worked out and he is able to get on with pursuing what he feels is the best choice for him.