Speaking as someone who was born in a largely unhappy marriage, I honestly don't think Lihen's doing her yet-to-be-conceived child any favours. It's possible to grow up 'normal' and be generally successful even under those circumstances, but it's a terrible situation to be forced to grow up in.
You can try to shower as much love as you can on your child, but the ugly tension between you and your spouse (and in-laws) will hang over that child like a weight all the time. Children don't have any say in the manner, they're brought into the world against their will after all, and then a couple (especially in those times) basically just force themselves to stay together 'for the sake of the children', or to save face. That very reason is hurtful to the kid, who grows up feeling like they're the lynch-pin to all this unhappiness and tension, and it's their fault that it continues.
It's a very complex feeling, growing up and knowing it's not your fault but at the same time always feeling like it is.
Lihen's child understands this, that's why she told her mother to just choose love next time. I wish Lihen would just listen to her.