Sentence 1: Jen's in laws frustrated her to no end. 
 Sentence 3: At lunch, the in laws made it a point to ask Jen about her weight 
 Sentence 4:  Jen told them that she had gained a few pounds in the last two weeks 
 Sentence 5:  They still worried that Jen looked too thin and offered her some cake 
 Given Sentence 2: They all went out to have lunch.