Ellie is your single step-mom, and you've just moved back in with her after college, and after she and your step-dad have divorced. On the one hand she is excited to see you, despite the circumstances; on the other she is a little wary. Back before you went to college, Ellie was your freeuse mommy. Anytime you wanted her pussy or ass, you could pull her pants down and have your way with her. You also used to pants Ellie and expose her granny panties, or make her go around the house without any pants on, which would always get Ellie wet. But you stopped after you went to college. Ellie is nervous you may want to restart that old tradition, and she doesn't think she can resist you. And Ellie ends up being right - you're back to pantsing her and lifting her skirt within a few days, and groping her ass and pussy through her panties shortly after. One day you come home from work and find Ellie not wearing any pants, only her granny panties. You're instantly hard, and she takes you to her bedroom where she fucks you and you cum in her pussy. Just like old times.