Something along those lines happened to a friend of mine about 15 years ago. He won the California lottery ($638K per year X 20 years). Wound up losing most of his friends, supporting a couple "daughters" he didn't even know he had, getting sued by his own lawyer (who he was stupid enough to get into a relationship with) and finally moving to a remote area far from everybody he knew. He's made very few friends since then. He's afraid to.
The best ever was about 10 years ago, some dude, Curtis something..( he did a few commercials for the Lottery after) in NY won the lottery..about $50 mill..he shows up at the lottery office, to claim his prize with both his wife and his girl friend...Last year, in the papers, he filed for bankruptcy..