
I think he wanted to marry out of obligation/ to fit with the social norm rather than true love. This means if they are married taking care of the kids will be her obligation rather than her choice to take care of them which is not what this manga is about. Though, I really prefer that the mangaka show some romance between the two. They like parents who wanted a divorce but stay for the kids lol or like a co-parent rather than romantic partner. There is no balance in their relationship. I just hope that this is intentional and not the mangaka not knowing how to write romance between two grown adults. It's very tricky to write romance between two middle age adult because they have more rationalities and responsibilities than teenagers/young adults. So love of passion wont cut it.
the uncle should marry his gf already