Given the task definition and input, reply with output. In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.

Sentence 1: Jennie and Tom has been together for five years with three kids. Sentence 2: Jennie recently started feeling distant from Tom and the kids. Sentence 3: She went to therapy and talked about how she was feeling. Sentence 4: She was prescribed Anti-depressants for a month. Sentence 5: Tom found out that Jennie cheated on him with his brother. Choices: a. Story. b. Cheater.
b