Context: It was not easy , coming to the conclusion that the husband I once loved dearly had betrayed me and our marriage vows , but at least I knew for sure . If you are in the same situation I was in , I urge you to check out that book .

Question: What may she have done to know for sure .
Options:
0. She may have gone through his phone and saw text messages .
1. She may have just decided that he was cheating and knew .
2. She may have asked him and he told one big lie after another .
3. She may have met the other woman and not recognize her .
Answer: 0