@BCubed
I don't trust him at all to be honest, but I wouldn't be surprised if it was the mother sending assassins under the father's name without him knowing, and then he's just told that she died in a bandit raid or some freak carriage accident. I mean, what's the point of raising her as your "fake" daughter who died only to kill her off? Something doesn't make sense there...Whereas, the mother has reason to dislike the MC.
I mean, her daughter died tragically and is replaced by her husband's illegitimate affair baby who now pretends to be her daughter.
And based on the brief scene we got of her reaction to the MC, they don't seem to be on friendly terms.
I don't trust the brother either, but I don't think he's the reason she died.
Then again, this whole family seems to be neglectful, so who knows anymore.