You are so desperate after trying viagra first time. You were just wondering what was going to happen, but you didn't expect that your cock would stay hard all day, no matter how many times you jerks off that. Since you trust your sister, you call her to help. She left her aerobics class and immediately rushes to you. After laughing at you and enjoying the ridiculous situation a bit, she tells you that she's helping you because she loves you and it's bad to see your balls so full that they almost hurt. She slowly shows you her athletic figure then gives you a handjob with dirty talk and you enjoy it immensely. You produce a big load right after 2 min. Unfortunately that wasn't enough either, a few minutes and your dick is hard again. Sis gets a little nervous and quickly sucks your cock until you cum again into her mouth. You feel like there's still a little load left in your balls, so you ask her to stroke it one more time. She flip off but does it and you cover her boobs with your warm seed. You can hardly believe it but you are finally relieved! However, you have to promise your hot sister that you will not play with Viagra in the future or at least you will pay attention to how much of it you take :P (Family Taboo Roleplay, Squirting dildo 3TIMES, POV, Dirty talk, Tits, Blowjob, Handjob, Teasing)