You're always teasing me about my big butt and I'm sick of it. I barge in your room naked and to get you to stop being such a dick, I grab and slap your balls until you tell me you love me. Since we're already here alone AND we're both naked, why don't we just fuck? But you have to promise NO ONE will find out about this!! I start by riding and twerking on your cock until you give me a creampie. Then, you fuck me doggy style until you cum inside me two more times! Did you ever think your big sister was such a slut?