Old movie about very strange family

It was an older color movie, I saw it on netflix a long time ago. It was about a strange family consisting of a brother, sister, and mother living in a mansion. I don’t remember if there was anybody else living at said mansion. Anyway, one night (I think it was at night I could be wrong) the two siblings go out beyond their property and run into a man and woman. They start playing with the two and eventually end up killing the woman with the guy ending up at their mansion. I don’t remember much beyond that.

3 thoughts on “Old movie about very strange family

  1. Hey that’s it. It wasn’t the greatest movie in the world but it was torturing me for ages what the movie was called.

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