I am near Houston, so I don't have any recommendations that are in San Antonio or Austin area.
I found these websites and their b-pics look nice-they are both in Austin
Austin Imagery Photography - Wedding, Portrait and Boudoir Photography in downtown Austin, TX
Boudoir Photography Austin - Boudoir Photographer
I found one in San Antonio, but I didn't like the look of their boudoir's as much-it is called Stilettos. Good luck!
There are b photogs in Houston that look like they do a wonderful job, but that might be too far for you.