Early on in our relationship, SIL insisted DH & I had to go to hers for Christmas, but told us we had to arrive on Boxing Day & stay the week. We didn't want to, but SIL went on & on about how she wanted 'a big family Christmas' that year & piled on the emotional blackmail.
DH & I couldn't have a proper Christmas dinner because of setting off early the next day & leaving the place empty for a week, but I consoled myself with the thought that SIL must be making a full Christmas dinner on Boxing Day - big family Christmas & all that, which in my family meant the whole works, beautifully cooked & with more food than anyone could eat. I'd just have to wait an extra day.
On Boxing Day, after driving for 5 hours we arrived at SIL's to find no delicious roasty smell & no sign of any cooking going on in her empty kitchen. Food wasn't mentioned. After a couple of hours we were offered a cup of tea. Still no mention of food. Things were looking bleak.
Finally we were ushered into the dining room where we were each allotted one slice of pre-packed beef or ham, a slice of bread, one lettuce leaf and one tomato. I don't eat tomatoes. SIL smirked, "We don't like roast turkey in this house." There was no dessert.
This meal was repeated for lunch & dinner, day after day for the whole week, until I thought I was going to die. One day BIL announced, "We're having a hot dinner today," which got me excited but turned out to be hot mashed potato, accompanied by a slice of beef or ham, a lettuce leaf & a tomato. They hadn't broken my will: I still wasn't eating tomatoes.
When the sales started in a nearby town, DH & I used them as an excuse to go out on our own. We found a department store with a restaurant & had our first real meal in a week. Fish & chips never tasted better.
We never had Christmas with DH's family again, so some good came of it.