A and B are splitting up but living in same house currently. B asked A if they wanted something that required to be disassembled. A said yes and B suggested they did it today. A said they had things to do in the morning and later in the afternoon but would try and get home to do it, if not would do it tomorrow. A did not come straight home from morning thing, stopped and got some shopping. Came home with an hour to spare before afternoon appointment.
B was very upset by this as they had spent time looking out the instructions for the item and felt there was not time to disassemble and pack away properly as A did not come home early enough.
A dismantled the item, B came out to help but A said they would do it themselves. The item was disassembled and mostly packed away barring 1 item which needed cleaning and drying.
B is angry with A as they feel they tried to help and A just took the piss and now has not packed the item in a way that will be easy for A to reassemble when the time comes. A doesn't understand why B is so upset. Who is BU?