Jon put the pencil down and ran back to Zoe's room. The sight that greeted him was his sister, lying on her bed, masturbating frantically. With one hand massaging her breasts and the other furiously thrusting a vibrator into her sex, she moaned and whimpered.
"Come on, just one more..." she cried.
"You alright, Zoe?" Jon asked from the doorway.
"Three down, bro, one to go..."
"Anything I could do to help?"
"I'm having trouble with this last one," she panted, "can you, like, talk dirty to me?"
That was the last thing he'd expect to hear his sister ask him, but since it was his own doing that got her in the position she was in, he complied. He knelt down beside her bed and put his face close to her ear.
"I love it when you spread your legs for me. Your thighs are so hot. I want to lick your milky white skin until I can taste you."
Her moaning increased.
"I want to take you like the dirty slut you are, anywhere and everywhere. I'm going to put you up against the wall and pound my big hot cock into your pussy. Here, at school, in mom's bedroom..."
She squealed for a moment, then moaned again. "More!" she demanded.
"Then, when I'm done, you'll go down on your knees and lick me clean. You'll take my cock into your mouth and fuck it again. You love it when I degrade you, bitch, so we'll do it on the bus home from school, with all your friends watching. You so fucking mine."
At that she screamed in pleasure, spasming on her pink comforter. A few moments later she looked up at her brother with lustful eyes and sighed. Part of him wanted to back away, but part of him didn't, so when she leaned over, grabbed his head and pulled him into a hot French kiss, he had nobody to blame but himself.
