The Body of Christopher Creed Steaminess Rating

Exactly how steamy is this story?

PG-13

So that PG-13 rating is mostly because sex is talked about a lot, though we don't see it happen. Sex is often called "the nasty" and Ali McDermott is called a "turbo slut" on many an occasion, but the "nastiest" things get in this book is Torey, Ali, and Bo overhearing Mrs. McDermott having loud sex with her boyfriend upstairs. But we think that is probably sufficient enough for a PG-13, right?