Pull out your junk and start to rub one out.

Your gorgeous sister keeps frigging away at her clit. Copious amounts of her female discharge are flowing all over the bed. You undo your pamts and grasp your rapidly erecting member and start to rub as you ponder the circumstances of your sisters ovulating pussy.

Thick drops of creamy fluid bead at your ureathral slit and you use some of it to help your hand slide up and dowm your throbbing cock. You firmly press down on one of the veins bulging out of your dick massaging it along with your shaft. You imagine your cock in her, leaking precum against her cervix and paving the way for a more grand invasion of DNA deliverers.

Your sisters moaning spurs you on and you almost explode all over her door when she gasps what sounds loke your name as she clenches up with her orgasm.