Should we both miss a booked walk because one of us needs to do laundry?

Ned puts his last clean shirt on the bed. “We need to find a laundrette tomorrow.”

Mara asks who “we” is. Tomorrow is their only full day in Budapest, and she has booked an architecture walk Ned said he wanted to join. They are nine days into a fifteen-day trip through Prague, Vienna and Budapest. He packed a small bag and expected to wash midway; she paid to bring more clothes and expected fewer chores during the trip.

Ned had not mentioned the laundry plan until now. He thinks an hour or two together would be an ordinary part of travelling. Mara is happy for him to wash his clothes but wants to keep her walk. He says spending the afternoon alone among washing machines sounds miserable.

What would be fair here? Ned likes the freedom of a small bag, but Mara did not know that it came with a request for her afternoon.