I saw this movie when I was a kid so it would have been in the 80s. It had black twin girls and they were fighting over a white boy that they both liked. One of the girls had sex with the boy while the other one watched. And one of the girls led her sister into the woods and drowned her in a puddle. For a while I thought it might have been the silent twins but I don’t think it is… Any help would be much appreciated!