Aveirah Gorerret Avairah.
Not only did you show disrespect to your wife’s time and efforts in preparing the meal, you also show disrespect to her because she had to wait at home while you were stuffing your face with “cake, kichelech, soda, grape juice, fish, herring, gala, hot potato and lukshen kugels, hot chulent and kishka, and a host of those fatty foods that I don’t even know the name of”
What should you do?
Have self control and decide that you are not going to eat anything. Think to yourself that it’s treif and you won’t have much desire, if any. Wish Mazal Tov to the Baal Hasimcha, then go home and eat the nice meal that your wife or mother lovingly made for you.
Also apologize to your wife/mother for your past mistakes and tell her that you will be more considerate (and early) in the future.