What a brat. Your poor uncle, the man's a saint for allowing such a hellion into his life to totally destroy it. He should get out now while he's still sane and while he still has some friends. No wonder people tell him to leave the hell spawn at home when he visits. I would have no parts of that shit. Too bad your uncle can't tell his son to clean up his own mess and responsibility for his fuck trophies.
Your poor mom, right after surgery too. She must have been on some good pain meds to "take the edge off" otherwise, her head might have exploded. She was obviously trying to make the best of the situation and enjoy the visit with her brother.
I also see my own mom dealing with my 2 and 1 year old nephews' crap differently than she dealt with my brother and me. I don't get it. I hate kids and hate hyperactive ones even more.