Curious stepson JOI

When Marcy gets home she finds her stepson rifling through her panty drawer. She'd had suspicions but now, everything had been confirmed. She invites him to take a seat so they can have a little chat. She mentions she's just been to the store... and since he's SO interested in her panty drawer... maybe he can help her decide if the new panties she just got look good or not. As she proceeds to try on and parade around each pair of panties for him, the panties get skimpier.. and skimpier... She admits she knows what he's been doing with her panties. With his stepsister's panties... And she's willing to help him out a little.. if he wants... After all, her stepson is just curious! And what are stepmothers for if not teaching their stepsons?