No matter the reason, there's no justification.
Not to mention they're all elder brothers. The sister and her husband had just gotten married, and before they could even consummate the marriage, they had to manage their father's funeral. Not only was it emotionally taxing, but they also bore all the expenses.
Though the elder brothers claimed they weren't as wealthy, life wasn't hard for them, yet they pretended to be deaf and mute, not saying a single word.
Those who knew the situation understood that the brothers hadn't had time to deal with it, but those who didn't might be poking their spines and cursing them.