It's ryuu's, joe knew it from the begining because he can't even have children lol so while they were all "oh no, who is it from?" Joe was like "*pfft* oh nooo, who knows(ain't me lol)" or something idunno hahaha
The way you put it t's so funny!! but thanks for answering. I had this big ? in my head and needed someone to explain. And do they know it's ryuu's?
That I am not sure, it was a private conversation between ryuu and joe, so I don't know if ryuu ever told somebody
But who is the father of the baby? I don't understand...