Blu3's Manga

For some reason I feel bittersweet about the ending....I'm glad they're happy but I don't like the way things turned out and ended...I feel like there's some plot holes like with her husband's family, why would such a supportive and kind family suddenly turn their back on their son? And how was her mother able to get divorced when she was never able to before? Also what happened to her brother, father, and everyone else????