Based on a true story, Harold (Rupert Graves) arrives home after a spell at sea and finds rejection at home from his sister-in-law. Forced to seek lodgings elsewhere, he alights on Marjorie (Julie Walters) who shares a room with her teenage daughter whilst her husband sleeps separately for "medical reasons"! Initially all goes well, they all bond nicely and he settles in as one of the family. The applecart gets a bit upset, though, when Marjorie decides that she's got the hots for her new tenant and after some very timid rebuttals, he soon acquiesces to her demands! The daughter, Joyce (Laura Sadler), meantime, is fully aware of her mother's peccadilloes and threatening to tell her father, insists that she becomes part of their games. Not the sex part, no, but she essentially treats him like an indulgent new father - and one with whom she becomes increasingly infatuated. Needless to say, this situation cannot continue but it's only when he tries to end things that he discovers that his older paramour is quite prepared to make his life a criminal misery with some heinous allegations should he try to escape this web of deceit - before a picnic brings things to a tragic and definitive head! Walters and Graves are both fine here, but they don't gel especially well together and that's quite crucial to the addictive nature of this story. The sex scenes are almost comedic at times and the ease with which this menage-à-trois seems to thrive rather robs the film of much of a sense of jeopardy, or even that they might be doing something wrong and immoral. It does look good but the narrative is a bit flat and disappointing, I found.