Given the task definition and input, reply with output. In this task, you're given a statement and three sentences as choices. Your job is to determine which sentence can be inferred from the statement. Incorrect choices change the meaning in important ways or have details that are not mentioned in the statement. Indicate your answer as 1,2, or 3 corresponding to the choice number of the selected sentence.

Statement: On the other hand, Mrs. Cavendish believed that the slip of paper to which her mother-in-law clung so tenaciously was a written proof of her own husband's infidelity. Choices: 1. Mrs. Cavendish's mother-in-law had died when her son was a small child. 2. Mrs. Cavendish's mother-in-law had been holding on to a slip of paper. 3. Mrs. Cavendish's husband was cheating on her with three different women.
2