“He showed the words “chocolate cake” to a group of Americans and recorded their word associations. “Guilt” was the top response. If that strikes you as unexceptional, consider the response of French eaters to the same prompt: “celebration.” ― Michael Pollan, In Defense of Food: An Eater's Manifesto
Other research suggests guilt may actually increase perceived body weight and negatively impact body image. That's right, feeling guilty makes you feel fatter, and feeling fatter may make you want to eat more. ~Psychology Today
If you are going to indulge then do so with joy!