My grandmother. I posted about this recently. She's just not very pleasant, really.
She has 4 kids who each live in a different state. She now lives in the same state/town as my aunt, her youngest DC. Aunt has 6 kids (4 at home), the youngest has special needs. She also has three jobs.
My GM basically huffs and puffs and stews if my Aunt is not at her beck and call. GM has health problems and can't drive herself anywhere, etc, so my Aunt does all that. But my GM does not like children, so she "requests" that my aunt drives her places alone. She phrases it as "oh it's just so nice to spend time with just you!" But really, she just does not like kids. So my aunt has to get her older DD to watch the younger ones instead of just bringing her with them.
My aunt has to buy my GM cigarettes every other day. GM smokes half a pack a day. She cannot have a carton because "I'd just smoke them all!" So every other day she demands my aunt get her 1 pack.
Recently my aunt and my dad took my GM to a huge, well known clinic to see if they could fix her health issues. They both took eight or nine days off of work to do this. My aunt had to drive my GM ten hours to get there and get a hotel room. GM offered to "split the costs" with my aunt. My aunt apologetically told her that with all the money she was losing from taking off work she really couldn't pay for any gas or hotel costs. (My GM has plenty of money, BTW.) GM fumed for weeks over this.
Over the summers my GM stays in her cabin, which is in my parents' state/town, and they are expected to take over the running. It's not as bad because my dad stands his ground better than my aunt, but still!
I have several cousins in their late teens/early 20's and last year my dad, aunt, and their two brothers tried to tell my GM that a few of my cousins could take turns staying with her for a week. That way she could have someone with her to help out. Her response? "Absolutely not, I stay alone. And I will be staying all three months. DS (my dad) will be helping me."
Arrrgh! I'm dying to give her the what for but my dad has said no. One of her other sons is pretty feisty, though, and I sense he's about to snap.