Need help to find a movie...?!

About 2 years ago, I saw a pretty good movie on tv, and now I cannot remember the name!. All I remember was that it was this woman, who had a teenaged daughter and husband!. She cheated on a man one night, and lost some necklace or other piece of jewerly!. Then she felt bad or something and her and her family went camping and then on the way to the camp site, you see the man she cheated with stalking her!. Then in the end he ends up going to the camp site I believe, but he ends up killing the daughters boyfriend(who came down on a motorcycle!?) Sorry if this description is vague, but I'm hoping that somebody has seen this movie, and/or can help me figure out it's title!. I don't think that it was a big movie, so that may make it harder to find!. Thanks so much in advance to anybody who can help me!.Www@Enter-QA@Com

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