Sentence 1: Jenny received a dozen roses at her desk. 
 Sentence 3: She suspiciously looked her coworkers over for a clue 
 Sentence 4:  When she got home, her husband gave her an ear to ear grin 
 Sentence 5:  He told her he sent them only because he'd been thinking about her 
 Given Sentence 2: The attached note merely said they were from an admirer.