Here's the snippet. You don't really need to know what happened in the previous scene (power went out; that's all that's relevant).

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It was going to be a good day, Simon thought. Get done showing the house, go over to Jerome's, and party with some of that fine Brazilian powder. Of course, getting done was a barrier. He really wanted it to sell. Not because he was that impatient to get a new one, near Valerie's Parents from Hell, but because he was sick of showing it. Yes, that's a real fireplace. Does it look like it's made of plastic? Should I prove it by lighting a fire---under your ass, so you can make a freakin' decision already?

What he actually said was, "Yeah, it's a real fireplace."

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That part was perfect though.

But everything else is great, pacing, voice, etc.