A report in the Daily Star suggests that the evil Underworld boss - played by Andrew Lancel - threatens to rape Sally after admitting to her that he did attack Carla Connor (Alison King). Viewers of the ITV1 soap have just seen Frank acquitted of Carla's rape by a trial jury.
"Does Sally have what it takes to kill? Only time will tell," a production insider told the publication.
© ITV
Sally (Sally Dynevor) will apparently discover that her lover intends to double-cross Carla, with Frank warning her: "If you know what's good for you you'll keep your mouth shut, because the last woman who crossed me certainly lived to regret it. Maybe you want some of the same."
Sally will apparently be found standing over Frank's body in scenes to air later this year.
Dynevor has previously hinted that she thinks her character's estranged husband Kevin (Michael Le Vell) could kill Frank, saying: "If Frank hurt Sally in any way, I wouldn't like to guess what Kevin would do to him - I think he might even be capable of murder."
Coronation Street bosses confirmed Frank's murder after the trial verdict aired last Friday (February 3), promising that multiple suspects will have a motive for killing him.
> 'Coronation Street's Andrew Lancel teases Frank future, show exit
> More 'Coronation Street' spoilers and news from Digital Spy
