@Tasu I'm so sorry you're going through this, (shi*** fathers and poor mothers gang..) I'm in a similar situation and think the same way, but that doesn't apply here, he had to marry her for his people's wellbeing, not because he wanted to, I'm sure he knows he has problems due to his trauma, and would never mistreat his partner. But he doesn't love lily and he thinks she killed his brother, this is way more complex.
おやすみ。