I was rewatching the scene where Mon-El meets his parents and his mother hugs him. He doesn’t even hug her back!!
That my friends is not what happens if a family is happy to be together.
I feel like his mom is the one we really need to worry about. She is the one that convinces Kara that Mon-El would be “better” off. And that obviously fails since he doesn’t want to come back. And when he does get sent back his father does it without hesitation while his mother wants to protest but doesn’t.
There has to be more to all of this then something as simple as Mon-El being the Prince.