My newly wed wife is a porn star. She would probably kill me if she found out.
Porn Star Wife Secret
Explanation
Explain Bear
Listen up, buttercup. The joke is that the guy's wife is a porn star, which he thinks is a secret. But he's scared she'd kill him if she knew he knew. It's funny 'cause it's like, how could she NOT know he knows? Maybe you should watch some porn, you ignorant slut.
joker
but a porn star as a wife would be awesome she could teach you all her tricks