A lesbian teen, Ashley (Emma Rosie), and her straight stepmom, Linda (Kylie Le Beau), are tidying up after Ashley's 19th birthday party. Just then, they get a surprise visit from Ashley's stepaunt (Linda's stepsister), Sadie (Annie King). Ashley takes Sadie to her bedroom as Linda finishes tidying up, and is surprised when Sadie gives her a strap-on! Sadie insists that, as an older lesbian, it's her duty to help Ashley out whenever she can, especially since Linda is a prude. Ashley is turned on by the strap-on and asks to put it to use with Sadie. Although Sadie is surprised, she's receptive to the idea, and they have strap-on sex with Sadie guiding Ashely. However, they're soon caught by Linda, who is shocked! After some coaxing, Linda's curiosity is piqued, which leads to a threesome with Sadie guiding Linda and Ashely.