Please please be aware that when kids form a parental-role bond with a person married, or in a relationship, with their biological parent and that relationship ends, they can't just "switch off" their feelings.
They will always see " uncle Jayk" as Dad. Or uncle. They are programmed to have a special, life long love for the care takers of their childhood.
In many ways romantic relationships are the most ephemeral. Even though religion insists you are "one flesh," the truth is they are the most disposable of all our bonds.