Bruce couldn't possibly care any less whether or not anyone would hear her. Granted, chances are no one outside the department will pick up on anything, but if there happened to be someone else working just outside his office, they most definitely would hear Trish screaming loudly and calling out his name with crystal clarity. It doesn't really leave much room to the imagination as to why she's screaming like that.

He pushes his fingers hard into her as she comes, fucking her deep and fast through her orgasm, a soft choked moan of his own spilled against her skin while he keeps sucking and nibbling at her nipple. He's perfectly aware he's just overloading her senses at this point, but that only excites him further, and he only really slows down when her body actually starts to tremble from overstimulation, though his fingers continue to slide in and out of her slowly, curling so the pads press against her hot and clenching muscles.