Stepson Caught Jerking off P1

You are home alone and enjoying a jerkoff session when your stepmom gets home and catches you in the act. You feel so embarrassed, but she tells you it's ok, all natural with the hormones running. She even suggests you could finish off like nothing happened. This is getting crazy, stepmom watching you jerk off...and she even wants to help you by getting naked and masturbates for you.