Healthy in the head and happy people won't disperse unhappiness and hurt around themselves. They do exist and people around them have to find civil ways to cope with it personally and take care not to make matters worse. Interfering, which you mention, is one of them. Fortunately, there are plenty of resources available to help us in these situations personally and to avoid conflicts/make matters worse.
we as daughters, sisters, wives, ex-wives, mothers, daughters in law, sisters in law, mothers in law have a choice to make things better or worse for our families. our real characters shine through our behaviours towards them.