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step-SIS is curious if putting things in your butt actually feels good. You (big step-BRO) encourage her to experiment with her pinky finger, her mascara tube, until she starts craving something bigger. How much bigger does she need? Her loving step-Bro sees she's desperate to cum from anal. You know exactly what would make her feel better, but is it weird to fuck your own step-Sis' butt? Definitely is.... But you've been watching her stimulate herself and now you're super horny, too. She's right there begging to cum. There's no one else home. You've never done anal, either. This could be the perfect time to mess around where no one will know you slipped it inside your step-Sister's butt. **INCLUDES: taboo step-Bro step-Sis fantasy / anal / POV / fetish roleplay / ass fetish / moaning