The Genie and the Three Wishes

A man finds a genie’s lamp and rubs it. The genie appears and says, "You can have three wishes, but whatever you wish for, your ex-wife gets double."
The man thinks for a moment and says, "For my first wish, I want a million dollars."
The genie nods, "Done, but your ex-wife now has two million dollars."
The man smiles and says, "For my second wish, I want a mansion."
The genie grants the wish, "You now have a mansion, but your ex-wife has two mansions."
The man thinks hard for his third wish, then grins and says, "For my last wish, I want you to scare me half to death."