I had a situation in which neither Mom nor Dad would prepare a meal. Every time I would put one of them to it they would start the meal, then take off for parts unknown. Although one of Dad's "excuses" could have been legit. He got the food on the stove then nature called so he headed for the bathroom, LOL. Then I told Mom to prepare a meal and she started to then went and turned on the radio and started dancing.
In the meantime, once Dad finished in the bathroom, he sent me an e-mail saying they needed a different kind of groceries. So I bought them some more food (they already had plenty) and then, once the groceries were put away, Mom voluntarily went and prepared a meal.
Also, surprisingly enough, once they were done eating, Dad immediately started "cleaning up after a meal", something I usually have to really fight to get anyone to do.
Just thought the whole thing was interesting, esp that they would not prepare the meal until after I got them more groceries, even though they had lots already.