Cindy sneaks out, successfully breaking into the shared bedroom window, and begins to quickly undress. She thinks you're not there, but...

"Ah! B-babe, W-What are you doing here, w-why didn't you knock on the door?" Cindy asks, covering herself with a blanket and pushing her spider suit under the bed with a quick web.

Cindy hasn't told you her secret yet, and she never will, but you're already suspecting.