Sickly client obligations

I once worked for an agency where the major client had a really thick
daughter who was homework intolerant.

So, the client (her father, who was rooting his secretary) made the
agency do her homework for two terms, got graphics done by the
studio, and made the creatives (my partner and I) to 'doll' it up so
that it looked flash.

We got no thanks whatsoever.

Other sickly things I've had to do are the really saccharine 'Happy
Birthday' breakfasts, cards, and sing-a-longs to unappreciative clients.

Any others?