I'm going to suck you brother, but run fast

This guy has come home just when his sister's coach was just fucking her and his cock was very hard. He tells him that if he doesn't run his eggs will explode and it will hurt a lot. First he convinces her to make a straw, but as he doesn't run, he tells her to suck it. The sister at the end gives her arm a twist and tells her that she is going to suck it, but adds "run fast". He doesn't want to have to eat half an hour eating a tail, so the sooner he notices his brother's semen inside his throat, the better.