Your step-sister-in-law is making you coffee while you waiting for your wife, my step-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!