But even my late-60s in-laws are guilty. I know that whenever they visit, we're going to have to go out to eat at least once every three days. Or even worse -- go out for drinks, even though we have plenty of alcohol (that we keep on hand mostly for them). It's why they're living on Social Security and we're eying FIRE.
I hate visiting my sister because she nearly never cooks for me. My mom has cooked more meals for me in my sister's kitchen than my sister has cooked for me in her kitchen. I don't know how it happens but she doesn't felling like she needs to 'host' me. Tones of take out and eating out, with a lot of time me paying for her family's food too. I've got to stop that.
I kind of joke about it when we visit family. We go every 2 years to the east coast.
Towards the end of my mom's life, she stopped cooking mostly. Oh, she'd do it, if she was sober, but the alcohol and depression...
Anyway, I'd go home and cook. I'm a bit of a food snob, so when she asked me what to buy, I'd tell her that I'd shop myself. Mostly because I eat a lot of produce, and they don't, so I want it to be good quality produce. (Note: I shopped at Walmart when I went home, because they had the most turnover, and the produce was therefore better quality.)
When I went home my bro and sis and their families would come over, and I'd end up cooking for something like 10+ people, and would have to go shopping again. Multiple times.
My mom is gone, but still when I go home on vacation I end up cooking for my step-dad, my own family, and probably the siblings and their families. I love treating my step-dad (it's hard for him to be single, he doesn't really know how to cook, but is learning). So...not a vacation really.
At my MILs house, it's almost the opposite. She cooks everything, and doesn't really want me in her kitchen much. When the boys are busy (hubby and kids), we do enjoy cooking together (generally I'm her sous chef, chopping veggies). She tends to make big batches of food ahead of time. I have noticed that if she doesn't feel like cooking she may order in a pizza (this is rare). Once, and only once, my hubby and I cooked for them (when his parents were still married). I don't think they liked our burritos. I think we all went on vacation once (with my SIL's family), and SIL and I cooked for them once too.
I think she just is still the "mom" and hasn't gotten used to other people cooking for her, in her kitchen. (She's fine letting me cook for her in my kitchen.)
It's interesting because we all cook very different things.