Yes, but your distaste is showing through. So what if they have a disabled child? We have ever reason to believe that, like Sarah Palin, they can handle it. More than that, they will love that child as much as the others.
You have a boat load of kids and decide when you are old and it is dangerous to keep popping them out (by choice).
Seems to show a lack of responsibility to me and no care about loading up their kids with a possible expense and burden for life after they have gone.
This could become a case of their choices becoming their other children’s responsibilities down the line.