Rosalyn Sphinx is confident that her groundbreaking lesbian love potion is going to finally earn her first place at this year's science fair. Everything's perfect -- there's no way she can lose! All she has to do is keep her project safe until she can get to school. Her step-mom, Kendra James, can be so nosy sometimes... To deter her, Rosalyn writes a 'DO NOT TOUCH' note and sticks it to the glass beaker before tucking it safely at the back of the fridge.Later that day, Kendra returns home from a workout. She's parched, drinking the first thing she gets her hands on as soon as she opens the fridge... which happens to be Rosalyn's experiment! Rosalyn hurries in moments later, shocked when she sees her mom sipping her award-winning potion as if it's just a nice cup of iced tea. She tries to stop Kendra but the damage is already done.Rosalyn is furious even as Kendra tries to suck up to her and apologize. Although Kendra claims that the potion's not doing anything, she can't seem to keep her hands off Rosalyn. In the interest of science, Kendra proposes that they put the experiment to the test! Why let all of Rosalyn's hard work go to waste? Surely there's still some data Rosalyn can collect... While Rosalyn wants to be mad at Kendra for being so reckless, she DOES still want to have something to show at the science fair...Rosalyn's anger quickly disappears as Kendra dives into her pussy, eager to eat out her step-daughter. Rosalyn returns the favor, seeing a different side to Kendra that fascinates and arouses her. As they bring each other closer to the edge, Rosalyn just might be able to salvage the experiment after all!Story inspired by an original submission by Girlsway member, user_23196293!