About a month ago my SIL and her DH went away to a holiday cottage for a few days. The cottage was on a complex about 2 hours' drive away from the town where we live.
On their last morning there they phoned us and said that they had managed to lose their car key, they couldn't find it and that they couldn't get home unless we picked up their spare key from their house, and drove it to them.
We had plans that day, it was a Saturday, but DH said he couldn't leave them stranded (a train home would have cost a fortune and taken hours and hours) and so we drove the 2 hour trip to the holiday complex. When we got there, they were nowhere to be found. I phoned SIL and she said they'd walked into the main town for lunch, and just to leave the keys at the reception of the holiday complex.
DH and I were a bit peeved at this point that they'd gone off out, and we decided to drop off the key at the reception, and then go off and do our own thing for the rest of the day.
We made the trip home, and heard nothing from SIL or her husband. Eventually that evening I sent a text asking if they got the keys and just got a "Yep, we got them" type reply, with no thanks or anything like that.
And we've not heard from them since, at all!
If I was in their position, I'd have been very grateful and at the very least dropped a card and bottle of wine or box of chocs round. They haven't even thanked us!
I'm cross; we do a lot for them and it seems that they totally take us for granted.