Biatu's feed

First of all, can he really not tell that child is his?? Like mmaannn he has your silver hair, purple and easy to draw eyes!!
Secondly if I'm not wrong it said " one year later " after being told " three months pregnant " how can that child walk, run and make a whole sentence???
And is the mother ( mc) okay with giving birth to another child and leave him to go back to her hometown? Didn't she said ' I don't want my kid to be involve with the royal family ' like lady??? Wouldn't your second child be involved as well? You wanna leave him be? Hellooo???
Too much to say but too stunned to write more