Wow, wholly shit. Life hit her triple hard. Her father's death, her father in law's death, finding out the King basically sent her husband out there to die, her Uncle-in-law trying to control the family, and then, lets not forget that her sister dies some time after this too, no doubt due to the king, not to mention all this happening while she's still emotionally unstable, pregnant, and basically no emotional support (since Harsen is gone, and I doubt her family is going to visit her for quite a while or vice versa).
Dayum, she's had it tough as hell, nothing but tragedy since she got pregnant. I'm actually surprised she didn't have a miscarriage from all this stress. She got pregnant at the wrong time, and like-wise unlucky, Vicente was born at the wrong time too.
Considering this is a normal old fashion war, they could last from 2 years minimum (thats how long it takes to move troops) to like decades. That means, Ercella would have never known when Harsen would even come back.
Everyone's got shit luck in their past, but Ercella particularly. Life hit her pretty hard during this span of 9 months of pregnancy. I wouldn't be surprised if she felt like Vicente is a harbinger of bad luck (though it wouldn't excuse treating Vicente like air), but at least she never physically abused him (probably got it lucky since most parents physically abuse their kids, especially in the past, and treat them like crap. The good parents were few and far between in ye olde days).