Hot?, I don't mean the weather.

I'm wondering, how hot is too hot for close-doored sex in a romance novel?

Sexual tension, brought to you by a sweet[ish] author.

Actually, I visited someone's blog recently who wrote [it was somewhere on there], and I'm paraphrasing... An author who writes [and deletes] the steamy scenes.  I might have to go find her and ask how MUCH she deletes. :D

Any thoughts on what's acceptable?
Not for the Faith/conversion-driven, religious fiction, either.
I do not write those... [sounds awful, doesn't it! LOL :D]