I fucked your Wife last night

Person who won the game: Better luck next time!
Person who lost the game: I fucked your Wife last night.
Person who won the game: Yeah, I'm pretty sure you didn't fuck her.
Person who lost the game: How do you know that?
Person who won the game: Because she was with me yesterday.
Person who lost the game: You fucked her, didn't you?
Person who won the game: Yes, I did and she liked it a lot.
Person who lost the game: Damn it, my cover is blown.