Tony accidentally meets Fran at his parents' gravesite. Based on John F. Kennedy's mistress Judith Exner and extremely attractive in her youth, she was the longtime mistress of Tony's father, Johnny Soprano, until his death in 1986.

She worked as a furrier in the fur department at Bamberger's, and is now losing her hearing, but admits she is too vain for a hearing aid.

She recalls meeting Tony once, as a child. Tony's father even confided in Fran about the deleterious verbal abuse that Livia put him and their children through. Ironically, she was on a date with Junior Soprano at the 500 Club in Atlantic City, New Jersey to see Enzo Stuarti perform when she first met Johnny. Hesh Rabkin never liked Fran and Tony thinks it's because Fran was Jewish and with Johnny Boy who was Italian, instead of Hesh.

Junior was also in love with Fran and wanted to propose, even buying a ring for her, but could not allow this marriage to affect his status in organized crime, and so could not bring up the courage to ask her. Tony learns that Livia forced his dad to give away his childhood dog, Tippy; it went to Fran and her son Bruce who is working for Israel's national airline El Al).

She was briefly involved with President John F. Kennedy and allegedly had sex with him in the Oval Office. Tony secures her promised sale-share in a midget-car racetrack, which was co-owned by "Johnny Boy" with Hesh Rabkin and Phil Leotardo.

While Tony originally enjoys her company, his fondness begins to wear thin, as she spends money, given to her by Tony, on expensive shoes rather than utilities, and then reveals that she continued to smoke around his father, even after his emphysema.

Tony learns that his dad was with Fran on the night Livia was hospitalized for a miscarriage. At the hospital Tony was even forced to lie to Livia, backing up his father's alibi that he and his father were together at a Yankee's game, which had to reinforce her sense of betrayal by both of them and the lasting schism between mother and son for the rest of her life.

After Tony recalls this situation that had caused him such confusion and emotional trauma in his youth, Fran is never seen again for the remainder of the series.

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