This is true, but it sounds as though this is just because your clients are facilitating this kind of behavior in their clients by not scheduling the meeting fo

This is true, but it sounds as though this is just because your clients are facilitating this kind of behavior in their clients by not scheduling the meeting for a time when the material can be prepared without people working in their family time. Presumably they do this because they expect to be able to lean on you when the work needs to be done.