My parents v kindly stayed at ours to look after DD for a few days, as it happened that DH and I both had to be away for work at the same time.
It was my DF's birthday while they were here, so I left a bottle of champagne, a card, and two glasses in a gift bag for them to enjoy (obviously after DD was in bed!). I don't think they even drank the champagne, but only went and took the glasses with them when they left! I wouldn't mind if they were standard glasses, but they were v nice Vera Wang ones that were an engagement gift from SIL...
I put the lot in the gift bag so it would be like a surprise on the day of his bday, but didn't mean the glasses to be part of the gift, but obviously it looked like that, my fault completely 
I'm both annoyed, because I loved the glasses, but more so, also mortified that they must now think that I gave them v obviously used glasses as part of a gift
. Siblings and I also got him a large gift together, if that is of any relevance. So would it be the height of rudeness to say it to them? Or say it to DSis to say it to them in conversation? Or stay quiet?!