As I stepped back into the hallway, I heard a rustling noise behind me. I turned around to find Brianna had stuck her head out to make sure I was gone. She must not have realized that even though I couldn't see much of her directly, the mirror gave me a pretty good angle. It hadn't had a chance to fully fog up yet, and gave me a decent view of my sister's upper body.

I stood frozen in place at the sight of Brianna's naked breasts. She had no idea I could see them, so she made no attempt to cover them or withdraw behind the curtain.

"I can...