I don't know if they are in Texas, but up in the Midwest we have a specialized chain of hotels called
SYBARIS:
There are even a few providers like Ginger here that specialize in sessions with this type of indulgence:
On that note, just a little piece of advice. Start with your provider. Make sure she really is into this type of session. Those that are, will be able to find you the best place. Those that aren't will not provide you with a stellar session. They may "accommodate" and agree to do a hot tub session, but there heart will not really beeen into it if they have issues or concerns with getting into a hot tub.
There is nothing more frustrating than laying down a couple of extra bills down on a fancy room when your provider really does not enjoy it.