DD is getting upset about not being able to see half sibling due very soon.
Dad is a dick head and not in contact, he did make a point of ensuring I knew about this baby being born.
I enquired about contact and as there is no history of contact with the new baby, and no contact with Dad, dd as a child can't ask a court to have contact with half sibling.
Dad's family are further dickheads and are too lazy and selfish to bother with dd.
It doesn't help that someone dd knows has had a half sibling born very recently, it is to the Mum they live with though.
What do people do in this sort of situation, when they know they have a half sibling out there and will never know even what sex the half sibling is?