Absolutely irresistible Natalie Porkman is super excited to get into her lab coat with her besties, Aria Skye and Riley Grey. The nerdy nubiles sharpen their chemistry skills by mixing some strange concoctions when her stepbrother shows up curious about their nasty experiment. The girls reveal they have come up with a potion that will create a four hour erection! They apply it to the lucky stepbro boner and share his prick, sucking and slobbering on it before taking turns enjoying cunt filling cock rides. Then, they tease a beakers worth of cum from his stiff wood. Turns out the potion works after all!