Lil Sis is ready to go out and party. Her make-up is done and she is wearing a very low cut dress that is quite short. As my big bro, you protest at my outfit choice. I complain until you threaten to tell step-mom and step-dad. So I want to do you a favor. I know it has been a while since you got laid. I encourage you to take out your cock and stroke it as I slowly reveal my tits and then my pussy. I finger myself as I offer you a blowjob. You are reluctant but eventually give in. Slutty lil sis sucks your cock, getting her lipstick all messy, until you explode in her mouth, her swallowing your load. She gets dressed and tells you maybe she might have more fun with you after her weekend of fun.