Natasha would like to say that under other circumstances that sound might have given her pause, but she's been in Hell so long at this point that she's not really sure anymore. She's lucid enough to wonder, but right now the effect is to send a shiver up her spine, making her squirm slightly under his hands.

She picks up where he left off: pulls off his tie, pops at least one button in her impatience getting his shirt out of the way.

She does pause at his belt, but only briefly, stilling her hands before she starts tugging his pants open.