"I'm sorry, babe," she said, slipping her hand inside my shorts and stroking my naked hard-on. "I didn't think they'd follow me into the shower. When they did, I thought they'd just see my butt again for like a second, which would just be one of those times we saw each other naked by chance and it'd be no big deal. But then they stayed and watched me shower. And while I cleaned myself basically in front of them, I thought that if I made a big stink of them standing there trying to catch another glimpse of my naked body, they would have felt all weird. I mean, I...