"My mother-in-law is a widow in need of a place to live....My wife wants to take her in....I do NOT want her in my home....My wife and I are coming apart over this...."
(From a letter to Carolyn Hax, syndicated advice columnist)
I regularly read Carolyn Hax's column, Tell me About It, partly because I think she's good, and partly because it gives me plenty of ideas to write about.
The situation described by the letter-writer---a middle aged man in a long marriage who is pretty much saying "it's her or me"---is more common than you might think. With people living well into their 80's and 90's these days, a lot of people in their 40's, 50's, and 60's are facing the difficult issue of what to do when mom or dad can no longer live alone. If the son or daughter is married, the decision becomes even more difficult, because it can't (or shouldn't) be made unilaterally. The son-in-law (or daughter-in-law) who has gotten along tolerably with mom when she lived a hundred miles away, may be less kindly disposed to eating breakfast and dinner with her three hundred and sixty-five days a year, much less being her chauffeur and personal-care attendant.
Carolyn Hax's advice was to exhaust every possible alternative before issuing a veto or bailing out of the marriage, and to be as creative as possible in coming up with those alternatives. I agree. People often assume the worst about some future event, and get so worked up about it that they can't think straight.
Maybe the couple---on their own or with the help of the rest of the family---can afford to pay for, or at least contribute to, the cost of a full-time or part-time aide to keep mom in her home. Even if that's not a permanent solution, it can buy some time and de-fuse the tensions. If she absolutely has to leave the home, now or in the future, presumably the home can be sold. Even in a bad real estate market, every home has some value, and most elderly homeowners own their homes free and clear of mortgage debt.
The proceeds of the sale, coupled with mom's social security checks and possibly other retirement income, can be used to fund assisted living. If assisted living isn't an option, the money could be used to add an in-law suite to the couple's existing home, so that their privacy would still be largely preserved.
If the daughter has brothers and sisters, now is the time to lean on them. The fact that some of them may never have done their fair share shouldn't give them a lifetime exemption. Maybe, as I've written before, the biggest reason they're useless is that no one has ever insisted that they be useful.
To a large extent, creative compromise is the key to a successful marriage. The only marital issue I can think of that doesn't lend itself to compromise is the issue of whether to have children: you either want to have kids or you don't. But that's an issue that, ideally, shouldn't come up in a marriage. It's an issue that should have been resolved by the couple before getting married.
I suppose you could also say that people should take a long, hard look at the family they're marrying into before they walk down the aisle, and realize that "in sickness and in health" might eventually mean their mother-in-law's sickness or health. That may be asking too much of young people, but it should definitely be on the minds of older people who are thinking of re-marrying.