I dropped the thong, moved closer. My brother's p***s touched my skin, my belly, I nearly came. "I touched myself, fingered my p***y in your underwear. Know what I was thinking?"
"No', he rasped.
"I wanted to know what my brother's c**k looked like, what it felt like cumming in my mouth."
Dereck gasped. "But you're my sister."
My hand brushed his c**k. "What did you think about when you were stroking your c**k, wearing your sister's cummy panties?"
Dereck just stared. I moved my hand, just touched his c**k. He gasped. "Tell me, brother. Tell sis what you were thinking, seeing in your mind."
I could barely hear him. "Your p***y. I didn't know you shaved. Mom doesn't. I've never touched one. Your breasts are so perfect. And what it would feel like when you...."
I slowly dropped down t
