Aoi Yuki

I belive the Female lead is experiencing postpartum depresion..

Her sadness, mood swing and her inability to care for Vicente are all symptoms, and it is caused by the hormonal changes she experienced after childbirth.

Her stress levels were also high due to her being alone and constantly pestered by relatives without having any backup.

Also postpartum depresion can interapt the bonding between mother and child, and that leads to a mother reacting negatively towards her child or some times not responding at all.

It is said that mothers with postpartum depression tend to interact less with their babies, and are less likely to breastfeed, play with and read to their child. They may also be incosistent in the way they care for their newborns.

It's just a hunch but..
He isn't going to tear the whole bellrock palace down...
Is he? (￣∇￣")