Step-mom of bestie gives transformation into horny she-hulk to you for bday

Your best friend's step-mom and she comes in wishing you a happy birthday. She says that she heard you talking about the She-Hulk, and she never knew you were such a big fan of her. She leans in, and whispers that she can get you to meet the She-Hulk, as a little gift from her. Her arousal seems to start something in her. Slowly but surely she starts to transform herself into the She-Hulk for you. He clothes rip and tear off and soon her skin is green. She is then grabbing your cock and using it to pleasure herself with it. Later on she is back to normal and wearing nothing but a robe in her kitchen putting her keys down on the counter after giving you a good time at your party. She turns and finds her step-son in the kitchen which shocks her. He thinks the two had sex but she denies it and leaves to let him ponder what happened with her and you, his best friend.