Sneeking my cum in my sister
My sister is hot. I need my cum inside her. I always offer to go get her favorite milk shakes after I add my cream to it on the way home. Watching her suck on the straw, watching each swallow.
I know where she keeps her vibrator. I make sure its completely coated with my cum on the nights she most likely will use it.
The thought of her putting my sperm inside her as she climaxes drives me wild.