Dark Harbor

Dark Harbor is a 1998 film directed by Adam Coleman Howard starring Alan Rickman, Norman Reedus and Polly Walker.

That evening, Alexis dreams that she has taken a blanket to the young man and that her husband has attacked her in a fit of jealousy. In the morning, the couple discovers that he has made them a lovely breakfast, and it transpires that David has actually delivered the blanket to him.David invites the young man to stay for dinner that night to sample his own cooking in a challenge, then leaves to play golf. Alexis and the man waste time together while downing a bottle of whiskey, talking about themselves and dressing up for fun in the boat house. He explains that he is a poet, but that he is unable to write and shows Alexis his work, all in different handwriting. He persuades her to take dictation of a quite dark poem describing drowning. Eventually they go off on a wild mushroom hunting walk in the nearby woods, and Alexis stops the young man from consuming a mushroom that she says would have killed him in a minute. She then shows him how to tell the difference between the lethal mushroom he almost ate, and one that looks almost identical, but is in fact an aphrodisiac. After failing to convince her to eat the aphrodisiac mushroom, they return home, where he apologises. ........

Source: Wikipedia