I cannot stand this thing with Yrsa's daughter.
The protag goes 'actually, it could totally happen that two redheads have a black haired child because of genetics and stuff!'
No, it's actually quite impossible 'because of genetic'. Red (and blonde, for that matter) hair is a recessive trait, meaning that both parents would have had two copies of the gene for red hair and thus couldn't pass on any other hair colour to their child. The child having 'raven' hair just makes it worse because that's a dominant trait, meaning that it would 'overpower' a recessive gene and thus cannot be present in a ginger or a blonde.
The only way Yrsa isn't a cheater is the miniscule chance that a genetic mutation occurred.
It's genuinely on the level of two Asians having a black kid.