Sarah says she also didn't know for some time that she was dating a married man. "He was everything I looked for in a guy. I thought I'd found Mr. Perfect. So when he dropped the bombshell that he wasn't actually that available, I moved into another stage," she says. "I was deeply in love with him, and I thought if I kept going with this [affair] and being the person he'd fallen in love with, I could somehow win him away from his wife. I wanted to be number one. That was my challenge then."