You are still suffering from extreme penile swelling after ingesting some questionable pills you bought online. You need to ejaculate several times a day to relieve the pressure, but your cock is too big for you to do it yourself. Mom's hands are cramped from masturbating you so frequently, and she sends your sister in to take over. Your sister thinks your condition is hilarious! She laughs at how massively swollen your cock is and makes fun of it before tentatively beginning a massage with lube. You instruct her to go faster and harder, but pretty soon her hands get tired from the effort. Why won't you hurry up and nut? That's when you tell Sis how Mom always shows you her tits to make you cum faster. Sis thinks it's weird, but she takes her tits out and keeps pumping your cock. She starts going really hard - maybe a little too hard! Sis starts getting aggressive - she REALLY wants to make you nut! She only becomes rougher and more demanding as the "massage" progresses, while continuing to make fun of your size. Eventually she asks where Mom puts your cum. You inform her that Mom sucks the cum out from the tip, and she completely freaks out! That's SO GROSS! There's no way your Sister wants to suck her brother's nasty cum out of his freakishly engorged cock! But your load is on the way out, and Sis doesn't have much choice but to wrap her lips around your tip and catch the nut. That doesn't mean she has to like it! Sister hopes you get well soon, because she REALLY doesn't want to have to do this again! Sequel to "Mom Massages Your Swollen Cock."