When we downsized 11y ago I spent a couple of weeks emptying old ‘flip’ photo albums. Culled many. Put others in 2 big boxes to continue sorting once we had moved. Several months later I found one of the boxes I had brought contained photos I had meant to chuck out. You can guess where the ones I wanted to save had gone. I was so upset. I came to terms with it over time but every now and again one of our girls will mention a photo (thinking I still have it in a box somewhere).
I keep quiet and change the subject. All those memories. Baby photos, school sports days, family celebrations. I have to stop thinking about it or I’ll get upset all over again.
So, fingers in ears and ‘la-la’.
We had a similar thing happen. We lived to DH's parents and did lots of things for them. After they died, 2 of DH's brothers turned up and did a sweep of the house and disappeared. After about the 4th weekend if dh and I sorting the house, dh guilt tripped his brothers into coming to help. They begrudgingly stayed a couple of ours but, as they left, DH told them to take the black bags to the dump. They took all the black bags including the 2 with years of family photos. It took dh a long time to get over that!