Etiquettes

Preparing more than one dish of food

Q:

1. Is it an authentic statement in Islam that, if we eat with more than 2 items of food, we have to feed a guest or guests?

2. If anybody cooks and eats with more than 5 or 6 items almost every day, will Allah Ta'ala will like it?

3. And if anybody wastes foods mostly due to cooking too much, that person will be sinful?

4. If a wife's husband always wants to eat more than 5 or more items, but she is busy with her kids and other household works, and her personal prayers, will she be sinful?