I think it should end.
Don't misunderstand. I love this manga. This is one of the few mangas I gave 5 stars and everything here us perfect.
However, there's only so many times can they have kids or explain the same problems over and over again in new volumes.
I want to keep watching them too but I am getting bored of the same story over and over again.
I think if the author wants to continue this should focus more on the kids rather than the parents. I like the Shizuku alpha phot line. I want to see Minato grow up.
Those could grow this storyline and not make it feel repetitive.