My gyaru sister Amiri has found out that I'm worried about sex not going well with my girlfriend! She's definitely just killing time and messing around with me for fun, but she grins and says, "I'll take a look at your boyfriend's dick, lol," and plays with it! With my cock rock hard, she gives me a handjob that stops me from ejaculating! I'm a premature ejaculator, so she teases me and makes me pee my pants! Even though I have a girlfriend, she says, "It's not cheating unless I cum with all my might," and she seduces me with a handjob! Just teasing my nipples keeps me erect, and my desire to cum continues forever! I want to cum, but she stops the handjob and I end up pathetically ejaculating! Because of Amiri... I'm going to develop some weird habits!