Chastity catches you looking at her tits in a way that step-brothers should not be looking. Having found out about her pregnancy you threaten to tell step-mom and step-dad the truth. In order to keep a snitch silent Chastity will do whatever it takes... even allowing you to rub one out to her pregnant titties. You want more of course, but you’ll settle for what you can get. She’ll allow you to wank to her preggy boobies, just this once.. As long as you promise not to tell step-mom and step-dad!