As a Boudoir Photographer, I do all types of boudoir sessions. Classically a boudoir session is done before the wedding with a boudoir album as a gift for the husband-to-be as a final result.
Brides are usually in the best shape and feel amazing, so it makes perfect sense. But a bridal boudoir session is becoming more popular at the beginning of the actual wedding day. I’m getting asked for this very often lately.