I watched this movie in the 1990s some time on tv and it was about a teenage girl who became best friends with the girl across the road and she loved her life so she killed her parents by pouring gas in front of the bedroom door while they were sleeping and she ended up staying with her best friends family and at the end of the movie they get in a fight and one of hem gets there head smashed over a sprinkler head.
“Poison Ivy”(1992)?
Was this a lifetime movie? But the girls end up being twins? If so I’m looking for the name too.