Bond, who managed to figure out this about her, agrees to help take down her boss thus helping her. Sévérine is a character who was forced in to prostitution and has been abused. Lets ignore some of the already questionable typical Bond stuff here – his arriving in her room unannounced, entering the shower without being in any way invited etc etc – and just think about the characters for a second.
Here's someone's writeup about it that conveys the absurdity better than I can: Compare that to the awful shower scene in Skyfall.
