Ramona Singer and husband Mario have split Credit: Bryan Bedder/Getty

Another Housewives marriage is on the rocks. After 27 years together, Real Housewives of New York's Ramona Singer and husband Mario have separated, two sources confirm to Us Weekly -- with both Ramona, 56, and Mario, 60, already dating other people.

At the moment, things are anything but amicable for the Bravo couple, who share college-aged daughter Avery; as first reported by Page Six, the couple recently got into a heated fight at their shared Hamptons home, with cops eventually arriving on the premises. (According to Page Six, after things calmed down at the Hamptons house, Ramona even offered the visiting policeman a "glass of wine," which they declined.) No word yet on when or if either party will file for divorce.

"They like to put on appearances like things are okay," one source tells Us Weekly. "It's been going on like this for awhile."

Adds another pal: "It is like war of the roses between them right now." As recently as last October, Ramona had denied reports that Mario had cheated with -- and impregnanted --another woman.