As you are moving invite your children to help sort out possessions; the one with the house can take her stuff; the two in university accommodation could surely be allowed to store a few boxes until such time as they have permanent homes.
I have a loft stuffed with my children's possessions; any request for them to remove it is met with 'Oh, just get rid off it' as in: 'you climb up to the loft, you sort it, you bin it and you take it all to the tip.' Consequently, most of it is still there.
Nearly a year on and not being able to speak to sister about our brothers passing

