Responses
The pink hair dude is related to the black hair (both share the royal family blood). They went along well when they were kids but, something happened and the pink hair started ignoring the uke. Fast forward to the present, the last time they met was four months ago the night of the last masquerade ball when the uke had sex with the baby daddy (possibly pink hair).

How could the pink hair dude be the father of the child the black hair dude was carrying if they did met a year ago?(if he was indeed this "lost rabbit") Shouldn't that mean the black hair dude already have given birth to the child a year ago?