Sentence 1: Maria came home from work and found a sink full of dirty dishes. 
 Sentence 3: In the middle of washing them, her son came down to the kitchen 
 Sentence 4:  He added his dirty plate to the pile in the sink 
 Sentence 5:  Maria scowled and told him to wash his own dishes from now on 
 Option 1: She decided to wash them even though they weren't hers. 
 Option 2: She decided to put the dishes in the dishwasher.