Ramona Singer Says Luann's Relationship With 'Deceitful' Fiancé Is 'Built On Lies!'

Luann de Lesseps may have found the love of her life, but her co-star Ramona Singer is suspicious of his intentions! In an exclusive interview with RadarOnline.com, The Real Housewives of New York star bashes her ex-lover Thomas D'Agostino Jr. for hiding details of their past relationship from de Lesseps.

"I don't think relationships should be built on lies," Singer, 59, told Radar. "He said him and I went out once or twice. Why? We went out a dozen times! Why be deceitful?"

D'Agostino Jr., also bent the truth regarding his romance with his fiancée's other co-star, Sonja Morgan, 52.

"LuAnn, he knew was living with Sonja and he never told her that they were lovers," Singer revealed. "Why would he not disclose he was with Sonja repeatedly? Who cares!"

Singer is also blasting de Lesseps, 51, for not informing her co-stars of their relationship in the beginning.

"With Luann, of course she can date whomever she wants," Singer said. "I thought we were developing a true friendship. I was disappointed. She should've said, 'The guy you were dating, I am now.' Just giving the heads up, not permission, the courtesy!"

Singer even revealed the RHONY serial dater asked Singer out despite her friendship with Morgan.

"I find it very strange that he would ask me on dates knowing I'm so close to Sonja and that they were lovers," she confessed.

As for Singer's love life, she isn't looking to snag a second husband any time soon.

"My new phrase is I'm dating and skating," she said. "Whatever will be, will be!"

The Real Housewives of New York airs Wednesdays at 9/8c on Bravo.