These two were beginning to make him feel physically ill.

It was bad enough that they had children in the first place; why did they wish to compound the original error by encouraging their friends to do the same? For some years now Will had been convinced that it was possible to get through life without having to make yourself unhappy in the way that John and Christine were making themselves unhappy (and he was sure they were unhappy, even if they had achieved some peculiar, brain-washed state that prevented them from recognizing their own unhappiness).