It's finally time to hit the road so we can go on this trip. It really shouldn't be so hard for you to use the bathroom before we hit go, but there seem to be a couple of issues. Time is ticking and every minute wasted means we have more chances of being stuck in traffic and getting there later than I would like. I don't get why you are being like this but I can only think of one solution if you can't get with the program.

It's finally time to hit the road so we can go on this trip. It really shouldn't be so hard for you to use the bathroom before we hit go, but there seem to be a couple of issues. Time is ticking and every minute wasted means we have more chances of being stuck in traffic and getting there later than I would like. I don't get why you are being like this but I can only think of one solution if you can't get with the program.