Sexy Fun Times/Wank/Hang/Shower/Leading
"You know, little girls who tease their big brothers, sometimes get more than they bargained for," you say.
"Can I see it," she asks with a grin.
"If you really want to; but you've got to promise you won't tell anyone."
She holds up her fingers in a salute; "Girl Guides honour." Hesitantly, you open your robe and she gets her first proper look at your stiff cock. "Wow!" She says. "I never knew they got that big."
You wrap your hand around your shaft and start sliding the skin up and down; she watches with her mouth open, mesmerised like a rabbit in the headlights. After a minute, she tentatively reaches out and you let go to give her free access. She's not the first young girl to wrap her small hand around your cock, but Katie's your sister and you keep getting that memory of her as a baby kicking her chubby little legs in the air as you slid your teenage cock back and forth along her slit.
You take her hand in yours and demonstrate how to slide the skin up and down. "You squeeze on the upstroke and then just slide it down again," you say, and she does as she's told.
"Will that make the sperms come out," she asks.
"It might if you do it right," you say. "