One person's embarrassment is another's forgettable incident. This could have happened to anyone.
At a place I once worked, a girl had baked a cake for her leaving "party" - there were only about four of us, so it was a cup of coffee and a cake. She had sprinkled some chopped hazelnuts on before cutting it, as decoration. Unfortunately, the bag of nuts was inhabited like your chocolates, and the cake was crawling. I asked if this was intentional - poor girl was mortified, but I was quite happy to remove the maggots and carry on, especially as they had only just been added.
I once read an article about this sort of thing - people being really embarrassed about something, while anyone else would just have shrugged. For example, for one woman it was the end of the world when her neighbour told her that, as it rained when she was away, she had taken her washing in for her.
The "washing" had been hung out intentionally to give intruders the message that someone was in, or at least due back soon, and was just some worthless old rags.
Anyone else would surely have thanked the neighbour and explained this to them, but she was just horrified to think that her neighbour now thought that was her normal washing!
So don't worry. The other guests will either forget it, or trundle out the story at other dinner parties, but no one will blame you!