I just read in the book Eldercare for Dummies that 80 - 90 percent of help provided to the more than 10 million older folks who require some level of assistance is provided by family members. Even though spouses are usually the first primary caregiver, adult children (mostly daughters or daughters-in-law) will shoulder more and more of the caregiving duties as both parents age and/or become overwhelmed.
I have joked that by helping to keep my own mother at home I am setting the example for my sons (and their wives) of how these things are done. Even though they joke about putting me in a $2 a day home at the first sign of trouble I am sure that my kids will do whatever they can to ensure that I'm well cared for if and when I lose the capacity to care for myself 24/7. I am particularly fortunate because both of my sons had the good sense and good fortune to marry awesome wives that I just love and who love me back. In any case, it's a good idea to be nice to your children, like the bumper sticker says because they will one day be choosing your nursing home!