Sisters jokes

My friend was pissed off with me. I was sniffing his sister's knickers. It was worse that they were still on her. It was worse the family were there. It made the rest of her funeral really awkward.

How do you circumcise a hillbilly? ... Kick his sister in the jaw.

What did one cell say to his sister when she stepped on his toe? Mitosis!

I saw my sister masturbating with a carrot. I said, "Come on, I was gonna eat that later! Now it's just gonna taste like carrots!"

My friend told me he had a sister. I asked if she was hot, and he said she was 8. That wasn't my question.

What do you say to your sister when she's crying? -- "Are you having a crisis?"