Let me start by saying, I am willing to be told IABU. I think it is unreasonable, DH does not.
DH had a large Lego collection as a child, so large in fact, that it was contained in several big suitcases, along with various mint condition Playmobil from the 80s. DSIL has a DS 6 and a DD 2.9. We have a DS 2.3 and another DS on the way.
When DS was a newborn, DMIL gave all of DH's Lego and Playmobil to DNephew when she and DFIL had a rummage in their loft. DH says he is going to get it back from DNephew and Dniece in a couple of years for our DSs.
I'm uncomfortable with this. Whilst I know it was DH's toy collection, PIL paid for it and DNephew and DNiece are obviously their GCs too. Should DH just accept it has a new home?