- HaRu isn't really a newborn like Seungri said. She was 5-6 months old (but ofc she's a newborn for a old dude like Seungri :p)

- Seungri's baby bro, Joon Ki, wasn't really died (can't be guaranteed). He was missing when his fam visited Jeju, and till now hasn't been found, even police had helped them searching him. Because of this, his fam assumed Joon Ki had been died. But for Seungri, who loved his bro very much, Joon Ki's still alive. That's why Jiyong was really careful when he talked about baby Joon Ki.

- Taeyang's closest cousin is Young Yi, because both of them live Michael Jackson. That's why even she wasn't talked by Taeyang's family, Taeyang was still able to visit her remote house

- Jiyong had never known that cow's milk isn't good for baby before Young Yi told him

- Little Seunghyun took care of two babies when Joon Ki was still with him, and the babies were very comforted. That's why the members admit his ability to take care of babies

- Jiyong thinks that HaRu has family, but she was abandoned because her parents have no money so they did so with HaRu. Besides, HaRu has low position in her real family (women hv lower position in a family bc they can't bequeath surname)

- Because of this, Jiyong overthinks that HaRu gonna do the same thing in the future. And he hates it

-***-

Mianhae to disturb you with these. But I hope that this will help you understanding the story :D