A Long Island law firm that is representing a matrimonial defendant and which hired an associate who previously worked on the case on the plaintiff’s behalf is fighting a judge’s ruling to disqualify it from the case for a conflict of interest.

According to court papers, matrimonial plaintiff Lori Janczewski previously retained Robert Venturo of the Suffolk County-based Law Office of Robert G. Venturo to represent her in her divorce from Adam Janczewski, who retained Ray, Mitev & Associates.