Ok I thought it was a little weird to but hey, they are going on a cruise and your W has an opinion. OK. Good for her. Everyone has one. I don't think this would even be worth arguing about. I would say something along the lines as "you know maybe your right." this reminds me of when my W would complain about something my brother did. At first I would fight her in defense of my family but after awhile I figured doesn't matter what she says they are still my family and so is she. So I would listen and complain and that was that.