Rosie O'Donnell is laughing off a report in Cindy Adams' New York Post gossip column that she is leaving longtime partner Kelli Carpenter.

"Rosie thinks that Cindy Adams is a lesbian but she doesn't know it yet," a rep for the former View co-host tells "She's going to leave Kelli for Cindy Adams," the rep adds.

Adams reported Monday that the pair -- who have been with each other since 1997 -- "may not be so together anymore."

O'Donnell, 46, and Carpenter, 41, tied the knot in San Francisco in 2004. Together, they're raising adopted children Parker, 13; Chelsea, 11; and Blake, 8. They also have biological daughter Vivienne Rose, 5. O'Donnell recently declared she's waiting to remarry Carpenter until "it's legal everywhere."