Good son: trace your fingers along her buttcheeks
From Create Your Own Story
You try to be silent and slightly touch her ass with the tip of your finger. Seems like she doesn´t notice you touching her. You slowly begin to trace your finger up and down her butt. Still no reaction from your sister.
You begin to be a little bit more daring and now touch her with all 5 of your fingers. Still no reaction from her. She has a small ass so there isn´t a long way to trace up and down, but touching it with her tight spandex shorts on still feels fantastic.
