Acting Out Under Pressure? Ramona Singer Creates Stir At Ritzy Hamptons Soirée ‘Humping’ Hubby Mario On Dancefloor, Panics After She Loses Phone

Ramona Singer, whose marriage with husband Mario has hit a rocky road this year, raised eyebrows with her outrageous behavior at a recent fundraiser in the Hamptons.

The Real Housewives of New York star went over-the-top with her kookiness at the 18th Heart Ball in Bridgehampton to benefit the American Heart Association, as eyewitnesses told the NY Post that she made more than one scene at the event, both after she lost her purse and phone, and a racy bump-and-grind with her love rat husband Mario on the dance floor.

“She was humping him, dancing on his leg,” one source told the paper, while another said the embattled couple — who tried to work on their relationship with a St. Bart’s trip last month — “looked like two dogs in heat.”

Despite the sexy shenanigans, an eyewitness said that Mario — who’s been tied to another woman named Kasey Dexter — “seemed disinterested” in his wife. Following the dance, an insider told the paper, Ramona “was frantically running around . . . screaming at the wait staff, demanding that everybody stop and look for her pocketbook and phone.”

The contents of her phone were somewhat in doubt: One Singer source told the paper that the real reason behind her outburst was fear that “intimate photos” taken of her during the St. Bart’s vacation, while another characterized the images as “just bikini pics.”

She never recovered the phone, and it was subsequently disconnected, the paper reported.

As we previously reported, Ramona’s been struggling dealing with Mario’s tryst, as sources tell use she refuses to talk about things with pals; and their recent stab at salvaging the marriage with the St. Bart’s trip took a turn for the worse when Mario complained of her drinking, and flirted with other women, leading to an icy silence between the spouses at one point.