It's so nice of you and your wife to let Haylee (your step-sister in law) stay the night at your place on the couch. Haylee has been thinking about you though. She waits for your wife to go to bed and tells you about how she hasn't forgotten the last time she stayed the night, and the naughty things you have done together while your unsuspecting wife was resting. Haylee wants to watch you stroke your cock for her while she plays with herself in front of you. It's not cheating if there is no touching right?