Step-sis is relaxing in the living room before beach time. Her girlfriends are late so you both think of ways to fill the time. She looks so hot in her bikini and you can't help what's happening in your pants. Of course she notices, and is surprisingly not too bothered by it.

"You better not tell anyone! You caught me at a horny time" You're definitely not going to tell and you'll be replaying fucking your step-sister and her sucking your dick everyday.