Read the following context and choose the best option to answer the question.
Context: She had been living with Beau # 1 at his big house for the last couple of years , and had spoken very publicly about her desire to marry him . However , after a steamy affair with Beau # 2 , she hastily packed up her bags and left . While she is sure that the magic will last , her friends are afraid that reality will set in as soon as she realizes that she just sabotaged her career . "
Question: Why is the marriage to Beau 1 not happening ?
Options: 
A. Beau 2 stole Beau 1 from her .
B. Beau 1 cheated with Beau 2 .
C. She cheated on him .
D. She has bad breath .


C