In your opinion, what another way Mary Maloney could have resolved her conflict with her husband

Forgive and actually forget.

Explanation:

It should be understood that no matter how lovely a marriage may looks like at the beginning, there will always be a time of quarrel. So, when the time comes the best solution will always be to find a way of forgive each other.

People, especially the couples should have the understanding that forgiving each other is the lubricant that will make their marriage go smoothly.

This is what Mary Maloney should have done to Patrick.