That is more than what the family has for Thanksgiving main dishes. We have side dishes, but no need for multiple main dishes. The turkey is the main dish. The sides are cranberry sauce, mash potatoes. Sweet Potato casserole, stuffing, and vegetables.
The best way is look at the difference between appetites is take a look at mom. When mom goes out to eat for her birthday, she can't eat a slice of birthday cake at home. She likes going to a Supper club. What happened is the meal makes her full despite taking food home. We have appetizer, soup, main course, and dessert. The answer for her is not have the cake on the same day.
Your boys on the other hand have appetite of t-rex. That means there is no left overs and would want multiple pieces of cake at home each after having dessert at the supper club.