
Cuz if she thinks she is pregnant and doesn't "pull through" with the pregnancy she will be assumed to have had a miscarriage and people will say that she is infertile and unable to have children. "Shame" on the family, they think winter will hate her, she will feel depressed and angry at herself for failing to give birth to his children.

They explain that ML can only have children with people with mixed blood of is mother tribe, but FL is royalty, meaning iher blood is complete "pure" making them unable to conceive children (she doesn't know).
If she does appear pregnant, it means she's cheating, this is why his parent's came up with this plan so ML can hate FL, their money make stay still.
Im confused can someone explain why the parents want violent to think she’s pregnant?