B.C.
Hi S., reading through the responses, it really sounds like you have gotten some good ideas. I especially like the one to pray and let God work in their lives.
One thing I thought of are family meetings. My niece and her husband have a blended family with two children who have shared custody, meaning an outside influence. The family meetings have been a God send, blessing if you will, because the kids have the opportunity to express themselves without fear of an attack type rebuttal. Parents are forced to listen. . . Each person in the family has the responsiblity of talking for a specified period of time, while the rest must listen and not interupt. They can rebut, but only when it is their turn. I believe you can find a lot of info about family meetings on the internet.
Best wishes. RC