My wife and I are the reverse. She has to go immediately before we leave, and we must have prearranged pit stops on the way. She's constantly amazed at my bladder control...(an admittedly minor skill.) She'll be happy to hear there's a reverse situation involving couples.
LOL! We are truly amongst FRiends here, to be sharing this information. FWIW, I envy my husband his ability to go in an empty bottle in an emergency!
It really is funny how many things are common to so many of us. I go on a trip, plan a stop in eight hours to pee and eat a gut bomb, eight more hours and stop for the night. My wife, on the other hand, plans her trip by where each of the highway rest stops are located.