Sounds like a recipe for disaster... just go to the major city sweetheart.
Unless you see a hooker walking down the highway, eh, two birds with one stone?
Don't have to get off route and still get your rocks off... it's possible!
Plus she might only want some nachos! (but then again that would probably be off course... unless a nacho man also happens to be walking down the highway! Then maybe you can hide behind his nacho stand and fuck and then buy her the nachos! )
Wow! I'm great at solving problems!
PS> IF SHE IS HEADING TO HOUSTON TOO YOU CAN GET HEAD ALL THE WAY THERE! YIPPEEE
** DISCLAIMER: this is me being saracstic, of course this scenario will never happen.