A divorced couple would like to eat the Fri. Night meal together with their teenage children, so there is no yichud. They feel this will be good for the children. He of course will sleep somewhere else. Is this muttar?
A divorced couple are divorced and they are not supposed to have contact with each other. They are not even supposed to live near each other, they surely should not be eating meals together. It is true that it will give the children a good feeling that there is some unity among their parents, but the parents should look for other ways of imparting these feelings to their children. For example that the parents should not fight in front of the children, and that they should empart a feeling of respect for each other to the children. Please see the following link where a similar question was asked http://dinonline.org/2018/03/19/eating-a-suda-together-with-the-kids/