A sentence of 10 years or longer seems excessive in my personal opinion as well, but I can't help thinking that the baby only entered the picture when she was already facing those criminal charges, so there might have been an element of calculation involved.
She has a demonstrated record of cold, amoral manipulation and calculation. Just my opinion, but I think the child is a clear effort to increase sympathy. I would like to be wrong, but I think the truth is more sad and horrifying than most decent people can or want to imagine.
Given her cold rationality, the timing of the child may be her lawyer's advice, to get her sentence reduced. No consideration for the actual baby, how it would be raised given the circumstances...
Never having a baby seems better than having a baby you won't be able to be a mother to for 10-20 years. It's not unlikely the kid would hate you when you get out of prison.
Ideal no, but she isn't going to be in prison 20 years, most likely not 10 either.
Kid will be raised by father and family, won't be poor, and it is unlikely kid will hate his mom.