The single mum - played by Samia Smith - will be in danger of a sex attack at the hands of Frank while visiting his home in a forthcoming edition of the soap, according to The Sun.
Frank is introduced to the cobbles as a new Underworld contact in this week's episodes, and it is thought that Maria is soon given the task of charming him into making a big order after she starts working as factory boss Carla Connor's personal assistant.
However, sources say that Frank will turn nasty while spending time alone with Maria at his house, telling her: "If you want this deal you'll have to be nice to me."
With Frank coming on strongly and making his intentions clear, the episode in question is expected to cut away from the scene and leave viewers to wonder whether he will rape Maria.
A show source said: "Time will tell how bad Frank's character will be - but he's a ladies' man and no Weatherfield woman will be safe from his interest."
Details of Frank's character first emerged last November, when it was revealed that former Bill actor Andrew Lancel had landed the part.