Without Stepsister's Knowledge

John is in bed next to his wife when his naughty stepsister creeps in and nudges him secretly. As his wife's horny stepsister kisses his neck and jerks his cock he tries to tell her to stop. She just tells him to be quiet and puts his dick in her mouth while the wife is a few feet away! She sucks his cock, kisses his balls and lets him feel her ass until he can't control himself any more and shoots a big load all over himself as his wife lies there oblivious of it all!