Why would my husband say he wished our daughter was another woman's child?
We are given no context for the statement. Spouses often have different opinions about raising children and different levels of empathy for their offspring.
The same sex child can have a very different relationship with that parent than with the other.
Is the child becoming the vicarious "Do Over" for Mom? Is the daughter measured against Mom by others because Mom was so awesome? Does Mom's light doom daughter's light to never be noticed?
I think it was an invitation for a spousal conversation, not a question on Quora for strangers.