Boudoir
A softer and more intimate look, usually shot in private. A chance for the model to be herself. Boudoir can involve the most intimate looks in a bedroom, or the most daring, confident looks in other settings.
Exactly what constitutes boudoir and what does not will depend on who you ask. I view boudoir as anything intimate and perhaps daring that the photographer and model have agreed to work together to capture. It can be lighthearted, or even casual; a woman preparing coffee, or getting ready for a night on the town, but in all cases the image is about her.