possible 90s movie title

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hi folks this is probably a long shot but my wife keeps going on about a movie she seen years ago , possibly a 90s movie about a couple of young girls who live near a beach or possibly on holiday and they meet a married couple who are staying in a beach house, she says the girls were quite wild and lounge about in swimsuits and loveheart sunglasses,playing in the sea and trying on the mans wifes clothes, one or maybe both of the girls have an obsession with the guy and possibly one girl kills the other due to jealousy, as I said its a long shot but any info would be appreciated, cheers
john



I seem to recall someone describing a very similiar movie here in the last year or two and someone else identifying it. If you're patient, you may get an answer.



The only thing I can think of is Summer Girl (1983). It's probably not it, but it's worth a shot



thanks for the replies but its not either of them