Like many of his kind, this changeling left the hive to travel the world. He never expected to meet the love of his life... a pony named Citrus Sweetheart: https://www.furaffinity.net/view/62637802/

Surprising everyone, Femur and Citrus managed to have a baby together: https://www.furaffinity.net/view/62637960/

Femur is a top-notch spouse and dad, but he sometimes feels like a fish out of water in Equestria. He likes to make regular trips back to the Changeling Hive to visit family and friends. His wife and daughter accompany him some of the time, and they enjoy their visits! They also like to take family vacations and collect souvenirs. Femur enjoys magnets and postcards, and he keeps a travel scrapbook with photos he has taken with his family.

As far as anyone in Sideways Equestria is aware, there are no other mixed changeling families out there... yet. When the next hybrid child is born, Femur wants to know so he can give advice and support to them and their family.

Femur also has a brother: https://www.furaffinity.net/view/62637554/