The current season of Real Housewives of New York' has only just come to an end, and the cast is already fretting over who will be offered a full-time role for the upcoming series - and are reportedly threatened by Tinsley Mortimer.

Tinsley, 43, is currently the youngest cast member and has parted ways with on-off boyfriend, Scott Kluth and is eager to get back into the dating pool.

 "A lot of the RHONY women have been warned there will be a cast shakeup," a source close to production of the show told HollywoodLife. 

"Some of the older ladies like Ramona [Singer] and Sonja [Morgan] feel a bit threatened by Tinsley who they know is younger and hot and recently single again. They know that's the audience they want to attract, so they feel a bit nervous. The entire full-time cast would like to come back, and they'd like to see each other come back deep down, they feel they're great, but they are anticipating some firings and hirings."

According to the source, only two housewives are safe - Dorinda Medley and Bethenny Frankel.