If Leon's mom has a new family w kids & all that, I'd probably cry. Like I'm sure Leon would be glad to see her happy but it's also heartbreaking to no longer be part of her life.
On the other hand, if Leon's mom has been stubborn and somehow held on, and ends up being able to return home with Leon, that would be pretty darn awesome.
I know it's probably gonna be the first option but a man can dream.