Still At War! 9 Reasons Why Jessica Simpson & Nick Lachey Hate Each Other Years After Their Divorce: Cheating, Her Father & More!

The fairy tale relationship that spawned the reality show Newlyweds began with a breakup. Simpson and Lachey fell in love in 1999 but broke up for five months in 2001. They got back together after the September 11th attacks and tied the knot on October 26, 2002. Simpson revealed that since her father gave her a purity ring when she was 12, she remained a virgin until her wedding night. "Of all the things about myself, staying a virgin until my wedding night is the thing that makes me most proud. I've been with men who've dumped me because they couldn't believe I really didn't want to have sex," Simpson previously said.

However, as her career skyrocketed and Lachey's crashed rumors began that she was seeking attention from other men. According to Jackass star Bam Margera, the two had sex while they were filming the Dukes of Hazzard. He told Howard Stern they "wound up at her parent's house drinking margaritas and it went from there." He also told Stern he "left at 8 in the morning," and admitted "she looked good I can't deny that," when asked if she looked good naked. Simpson denied his claims.

A year after they split Lachey fired a shot at his ex-wife. "I don't know if there were other men. But if she did cheat, it was the result of something bigger, not the reason we didn't work," he told Rolling Stone magazine. "Sometimes I think it would be easier if I had just walked in the house and found her in bed with a guy. That would be clear-cut. End of story. I wouldn't have to deal with the uncertainty of adultery."

In 2014 The Real Housewives of Orange County introduced Lizzie Rovsek, who had a past with Lachey. On the morning of Feb. 1, 2006 -- two months after Simpson filed for divorce -- he was reportedly spotted leaving the parking garage of Rovsek's Los Angeles apartment, and two nights later, they met up in a West Hollywood nightclub. "Jessica had already heard from friends that Nick had been seeing a 'striking brunette,'" a source told Star magazine. "She was hurt that he might have moved on with a new girlfriend so quickly. She tore into Nick on the phone, demanding to know everything about his relationship with Lizzie."

Joe Simpson told the source that he regretted the marriage for his daughter. "Joe said that Jessica deserved someone so much better than Nick," the insider claimed. "He said he was completely not right for her and he was so bitter at the end. He was jealous of all of Jessica's success."