I am on the couch massaging my thigh because I pulled a muscle at the gym. My sister comes in and wants to go do something with me. I tell her I am injured and she offers to massage my thigh to make it feel better. As she massages me she realizes that my cock is getting hard from her having her hand so close to it. She starts to rub my cock and then she sucks my cock. Now that I am fully erect and so close to cumming from her amazing blowjob, she gets on top of me and rides me until she gets all of my cum in her pussy!