He doesn't want his in-laws sleeping in their bed

K always lived in a one bedroom apartment so when her parents came to visit she always slept on the couch to give her parents better accommodations.

K is now married to A. We're supposed to attend a wedding this weekend and K's parents are babysitting. K was prepping the room and A asked her why. She said because her parents are coming.

He said he assumed they would stay in the guest room she dedicated so much time and energy to make beautiful and cozy for guests. She said her parents always slept in her room on her bed so they expected to get the master bedroom.

He said he didn't want them staying in their room when there are two spare rooms downstairs and one is fully dedicated to accommodate guests.

She told her parents and since they no longer feel welcome and don't want to come this ensued a big fight, where they both feel right and won't budge.