Sentence 1: The family started to gather their plates at the buffet. 
 Sentence 3: When the waiter handed the bill, everyone was silent 
 Sentence 4:  No one did anything until my aunt took out her checkbook 
 Sentence 5:  She felt angry since no person offered to split the bill 
 Option 1: They were picky eaters and picked the buffet so they didn't need a waiter. 
 Option 2: They ate a lot since the food was food.