A married couple, DW with no DC and DH with DC from previous relationship.
They have multiple pregnancy losses whilst TTC, some early others not and discover condition which means they may never have a successful pregnancy. DW decides she can't be around DSC at the moment so goes and stays with her parents whenever they stay. She is okay when they aren't there but can't cope being around them or seeing DH parent.
After a month of this the DH doesn't think it can continue any longer as it's unfair on DSC and DW needs to start spending time with them again, DW doesn't feel ready to spend time with them yet and wants to continue going to parents whenever they stay.
(Random vote)
YABU - DH should let his wife deal with it in her own time and understand his DC are a trigger at the moment.
YANBU - DW now needs to start spending time with her DSC even if it's incredibly hard as it's not their fault.