Family feuds are a commonplace situation where one has to know to maneuver the challenges with ease and perfection. The best way is to let the steam blow away and wait for the entire thing to simmer down. Usually, aggravation from a family can mess up the entire situation and make things even more difficult for all.
Ideally, it is a good idea to wait till things settle down and then discuss the point of contention again. However, it is not really possible every time. Usually, people get upset by rejection and this hurts for a long time.