Sentence 1: Heather has two sons and one step son, all of which are teenagers. 
 Sentence 3: Heather can not keep food inside of the house because of them 
 Sentence 4:  Her sons are always hungry 
 Sentence 5:  Heather is happy it's almost time for them to go back to school 
 Option 1: It is summer vacation and they are all home from school. 
 Option 2: It is summer vacation and they are all at summer camp for the next month.