I'm having a serious disagreement with my adult stepkids over Father's Day. Recently I asked about the date of a summer vacation they've been bragging to spend on a private island with their widowed stepfather and his large family of siblings. He has no children of his own, did not really get along well with stepkids until their mother passed away. Now it seems that the stepfather has convinced them that their mother's deathbed request was that they re-establish old family traditions. It appears that he's using their late mom's original child custody demands as a guide.