The marriage of Joe and Teresa Giudice of "The Real Housewives of New Jersey" went under much scrutiny during season four of the popular Bravo series.

But now, there is evidence that Joe cheated on Teresa while in Atlantic City and a source told InTouch magazine that Joe hit on Melissa Gorga, Teresa's sister-in-law and enemy.

According to Georgia resident Rosie Jones, on Sept. 23, Joe was at Harrah's Resort chatting it up with another woman until the wee hours of the morning. She said he then left with the unidentified woman in a cab.

While Joe was allegedly fooling around, Teresa was in Charlotte, N.C., appearing as a celebrity guest at the Southern Women's Show.

"Joe's friend came over and she sat on his lap and then Joe started rubbing her face and stroking her hair," Jones told RadarOnline. "Joe had his arm around the girl and as they walked off to grab a cab together I heard his friend say something like, 'Life is great.'"

Click here for pictures.

What else has Joe allegedly done to Teresa?

"When Melissa started dating Teresa's brother, Joe [Giudice] would flirt with her and check her out whenever Teresa wasn't looking," a source told InTouch. "Melissa always told me he was a 'creep.' He's so disrespectful to Teresa, but she turns a blind eye."

The publication also reported that Joe enjoys flirting with Melissa because it makes Teresa insecure and according to the source, "her biggest fear is Joe will lose interest."

"Joe got a kick out of flirting with Melissa. He doesn't care - he thinks he's an attractive guy. He always complimented the way [Melissa] sings. He told her she makes the most beautiful pregnant woman. He complimented her style, too," the source said. 

On part two of the reunion, Jacqueline Laurita accused Teresa and Joe of having an abusive relationship. She also said Joe has cheated on Teresa multiple times.

"If we're being honest, he calls her those names and she calls him names and they punch each other. You guys get into some pretty bad [fights]. I've heard every name in the book from you two," Laurita said. "You told me your husband cheated on you several times. Honey, you've caught him with the secretary, the babysitter. You asked me what you should do, because my ex-husband cheated on me."

However, the couple was adamant that Joe has never engaged in extramarital affairs.

Teresa recently spoke with All About The Real Housewives about her marriage. She told the website she never told Laurita that Joe cheated on her. 

"If I had proof of Joe cheated on me, I wouldn't be with him. I'm just not made that way," she said. "I know some people would stick with their husbands even if they did that but to each their own. It would be unfortunate but I would definitely not stay with Joe."