My husband is hesitant to forgive because he says he does not want to act as if the problem (with his brother) never happened. Do you have some advice for me?
It may help if your husband realizes that forgiveness and justice exist together. One can and should seek justice, and in my view, the quest for justice works well once a person already has forgiven. At the same time, once people forgive, they do not want to keep bringing up what happened. There is a tendency toward moving on. Thus, your husband, if he forgives, will not want to keep bringing up the injustice and, in all likelihood, he will want to leave it in the past.
For additional information, see Forgiveness Defined.