These comments in this thread are way too tame.
So let me pull out the beloved AITA cutlery set: She’s of course fully aware that what you did was not a prank but a loving gesture. She’s gaslighting you, so she doesn’t have to admit that she ate more than she should have and intended to eat in the first place. You should know that gaslighting is common manipulation tactic of abusers like your wife. You are NTA obviously and you should get a divorce. (Where the hell is the red flag emoji here?)
ntv ist nicht Springer.