“I don’t want to go on holiday with my wife’s elderly parents”

My wife of 12 years is angry because I don’t want to go on holiday with her elderly parents. The thing is,¬†we have already been away once this year, have another holiday next week with grandkids and another for me and her at new year. She doesn’t even have to work as I give her money every month, too.

It’s not just down to cost either, as I can’t stand her parents. They constantly bicker and have really bad and embarrassing manners. Wife is saying that they are old now and may not have many more holidays but her mum goes on about 3 or 4 holidays every year anyway. I feel like I am being blackmailed. Am I being unreasonable?