Oh she is tense alright, but not in a bad way really. At least the part of her that's saying it might be bad is some distance far enough away it might as well be another dimension.

She tries not to whine at the way his plating slides over her back, the warmth of his words washing over her audio. Yeah, she deserved that right? Revenge for all the wiggling? She can't stop the shift in tone of her engine though, which sounds interested. "B-been a long day. You expectin' something else?"