I'm not sure what it would feel like if my insides turned into molten lava or my blood began to sizzle, but it sounds unpleasant. The leads of Baby Bonanza seem to enjoy it, though. They - the arrogant (read: kind of an asshole) playboy cruiseline owner and the feisty single mother - didn't even like each other, but apparently feeling like you're in a sauna whenever a certain other person is around is enough like love to lead them to a happy domestic ending.
This author really must have used every synonym for "heat" that she could think of.
The second star is solely for the fairly sexy fingering scene.