Sentence 1: My sister in law lost her husband in 2016. 
 Sentence 3: She got a job at the Boston Opera house as an usher 
 Sentence 4:  She worked three shifts 
 Sentence 5:  She quit because much of the work was at night 
 Option 1: She needed another job to make ends meet so she got her old job back. 
 Option 2: She was looking for something to do, as she was retired.