Your sister-in-law is making you coffee while you waiting for your wife, my sis,to come back.. We chit chat a bit then I tell you to wait me in the living room because I have to tidy up something here....when I notice you're staring at me ! What ? Oh yes my pants are falling down revealing my crack ! I know you already have a boner....Do you really think I did not notice how you look at my ass every time we meet! So now that we are alone I will let you jerk off at my buttcrack, it'll be our secret...do it,do it fast,before your wife comes back!