No Mussels Or Oysters
Eating mussels or oysters is a no-no for Kate. The rule exists because of the health issues these foods present if they aren’t stored correctly. This is something the Royals simply cannot risk.
As delicious as these mollusks are, Kate can never say yes. Hopefully, before she officially joined the family she went all out with one last seafood feast! Then again, she might not like oysters anyways, making this an easy rule not to break.