
Ralph calls Nucci in the middle of the night pretending to be a Pennsylvania police officer and informs her that her son was found on a men's room in Lafayette Park "sucking a Cub Scout's dick" and that they found a gerbil in his rectal passage. In the next episode, after Ralph puts together that it was Paulie who told Johnny Sack about the joke he made on his wife, he decides to take revenge by prank calling his mother. Ralph Cifaretto calls Nucci Gualtieri in the middle of the night They chase Chuckie through the school and break his arm, and after some convinving by Chuckie's wife, Cookie finally lets Nucci spend time with them.

She informs Paulie of this in tears and after he visits the social director to no avail, he decides to send Benny Fazio and Little Paulie to assault Cookie's son Chuckie, who is a high school principal.

However, her friends (especially Cookie) quickly reject her and start making her eat all alone because she's "too emotional" and a "tattletale". Nucci is excited when she hears her friends Cookie Cirillo and Minn Matrone are coming to stay as well. In the episode " Mergers and Acquisitions", Paulie is helping his mother get settled in at Green Grove. This in turn causes Paulie to start taking into account more of what Johnny Sack has to say. To Paulie's dismay, Tony sides with Ralph and only agrees to offer Paulie $12,000 out of a $50,000 sum. Green Grove costs a fortune, however, so Paulie arranges a sitdown with Tony and Ralph over a pay dispute he has with the latter that, if resolved, could help to pay for his mother's care. It is noticeable how much of a contrast there is between Nucci's opinion of Green Grove and Livia Soprano's, as Livia would almost always be apathetic and distasteful around the place, while Nucci is so happy she begins to tear up over how her son got her into the top-tier retirement community. In it, she is moving into Green Grove retirement home and Paulie is helping her financially. Nucci first appears in the season 3 finale, " Army of One". It is said that Nucci would bust Paulie out of prison whenever he got into trouble as a kid. During World War II, Nucci's sister Dottie, who was training to become a nun at the time, had an affair with a soldier named "Russ" and got pregnant, so to hide the scandal, Nucci adopted Dottie's son Paulie and passed him as her own.

Marianucci Gualtieri was the sister of Dottie and Mary Gualtieri and the wife of Gennaro Gualtieri (whom Carmine Lupertazzi remembers was run over by a trolley) with whom she had three children: Gerry, Rose and an unnamed third son.
