Proffesional Family.
They are a couple, they tried to find a little couple of times, but no one was good enough for them, Matheo was busy with med school, Callina saw littles and kids every day, she was always on the search, but they couldn't find their match.
Open adoption days are a thing all school does, older submissives, and older dominants could come over and interact with everyone else, as long as they fit the criteria, no one over twenty-five is allowed, no sex until after the submissive have graduated school, the students have the power to say no always.