This movie is either late 80's or 90's. help

• teenage daughter with brown hair
• mother is a blonde(possibly a florist)
• daughter is secretly trying to find a man for her mother by placing an ad in paper
• daughter is having phone conversations with man pretending to be mom
• man is a killer/rapist

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i remember one where the said guy would kill woman by leaving creepy messages on their answering machines before killing them. does this sound right?

i can't remember the title, though. sorry!

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