DD1 got married last weekend. We had a brilliant time, everything went really well and we adore DSonIL - a good result all round.
However, AIBU to feel really shabbily treated by some of DH's relatives?
When DD1 first announced her engagement they were all over us on social media, tagging us all in anything wedding-related and talking about dieting etc for the big day. In the run-up they've been messaging me all the time about the accommodation we booked for them and all kinds of other details. In addition, they offered to help to look after MIL (sister/aunt to the relatives in question) who has dementia on the day and to make sure she was always with someone, which was helpful.
On the day of the wedding we received a call from the guest house they'd asked us to book for two nights to say they hadn't turned up. It turns out they'd decided not to stay over after all. Because they hadn't cancelled and it was booked in our name we have had to pay for it - £360! We live in a good place for a holiday and the guest house owner could easily have found someone else to fill the rooms if only they'd let him know.
At the wedding itself they turned up 2 minutes before DD, scuttled in looking dressed for another occasion entirely, and then left straight after the meal at the reception.
Today we paid the guest house - the owner kindly let us off half of it and agreed we only needed to pay £180 - but I am really, really annoyed. They are well-off and could easily have afforded to pay for it. Weddings are expensive - we will have spent at least £220 on their meals and drinks for the evening - and we could have done without this extra expense.
I was doing quite a good job of letting it go until DD went through the wedding list today and let slip that the four of them had spent a total of £8 on her wedding present 
I wish we hadn't felt obliged to invite them and had asked some nice people instead!