Spoiler I think: . . . . .. . .. . .. . ... ......... . . . . ... . . . . . . . Ohh I think I've figured it out! You know how he was glancing between Nagi and Kotone in one panel before it showed Kotone dejected? The baby just wanted to spend time with both his parents! So of course be loves Kotone.
I was very anticipating what baby yua thinks of our kotonE BUUUUT the fucking old ass man cut it, you son of a bitch