Sharing a Bed with Your Stepsis

Your stepsister is home from college for spring break...but what your stepmom failed to tell her is that she needs to share a bed with you, because her room is being painted. Yeah, she should've given her a heads up, but is it really so bad to share a bed with your stepbrother? You can tell she thinks so...but just wait til she hears the ruckus your parents make next door, every single night. She's just about ready to complain about the arrangement again when they start up: moaning, dirty talk, the works. And your stepmom LOVES to talk about your dad's cock. How big it is. How hard he is, etc. Your stepsis plays it off like she's grossed out but you can tell she's a little intrigued. Curious, maybe? Maybe, you think, she's wondering if size runs in the family...