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 has been put on a higher level of meds that haven’t helped. Psychologists, counselors and school staff are noncommittal about offering any help and haven’t advised on how to address this.

My concern is, my son and his wife now have a 6-month-old son, and I worry about the baby in this home environment. Our son loves his wife and thought he could handle the challenges that come with living with Lauren. He now says he thinks it is best to end the marriage, but he’s uncomfortable about giving an ultimatum to his wife.

He has a high-pressure job, and his new home environment is taking a toll on him, physically and mentally. Any advice for him is appreciated.

— Mom on the Sidelines

Dear Mom: I appreciate your concern for the well-being of your son, but if you are smart, you will remain supportively on the sidelines and not insert yourself into this sensitive situation. If your son feels so pressured he’s considering ending his marriage, he should be telling his wife about it and not his mother.