DEAR ABBY: Our youngest son recently married a woman who has an 18-year-old disabled daughter, “Lauren.” The girl’s mental level is between that of a 2- and 4-year-old. There have been physical confrontations between my new daughter-in-law and her disabled daughter, which are becoming more frequent now that they all live together. Our daughter-in-law refuses to pursue facilities for Lauren, saying she is waiting for her to be transitioned into a group home and feels much guilt in doing so. Lauren is currently in a day program, which doesn’t seem to be helping her. She has definite behavioral issues and ...