I'll make it brief and simple.

Friend and I decide to go on a hike.

His gf invites herself and insists on coming.

She gets all dressed up in her little shorts and has her hair done up all preppy.

We get to the trail, and walk roughly 10 minutes.

She already starts with the "i have to pee" bullshit they all like to do.

We convince her to just hold it so we go about another 5 minutes and she insists we turn back.

TL;DR - hike ruined by friends gf