He was staring at her, and she was trying not to be any more embarrassed then she already was. Her cheeks flushed a bit as he just stood there, watching her. Coming closer to her, she realized that if she sat back to think about if this was what she wanted, then that would take forever. Instead she thought about what Angela would do. If Angela was naked in bed, and Hodgins was asking her... okay no wait, no thinking about Angela naked or Hodgins. Back to the question at point.
Brennan nodded her head a little at him, "Yeah I'm sure." because that's what it boiled down to. Angela would've kicked her ass if she had randomly went 'hey i'm naked and asking Booth to have sex with me, is that a good idea?' she would have been screamed at and totally shaken like a baby if she'd asked her that and then thought about actually saying no. Right. Angela would make her. That's why she was saying yes. Oh. And because she really really wanted to.
She waited with baited breath as Booth climbed up on top of her. This was much different then kissing under the mistletoe. Very. She let out another breath. "Are you sure this is what you want?" because she had to ask him that too. To make sure.