Fucking My GF's step-Sister - Awlivv

Featuring Awlivv I picked my GFs step-sister Liv up from the airport because she was too busy at work, again... Liv had decided to take a nap when we got home. I was just sitting there when she started to subconsciously rub rub my cock! I thought it was an accident, but she started doing it again when I woke her up. I just want her to be comfortable and I don't see how this is any different than us getting coffee?