Finding a movie: Woman hallucinating her death kids

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Hi all,
I'm new here and I hope you can help me finding this movie It goes like this: It's about a woman, who, after catching her husband with another woman, is involved in a traffic accident with a school bus and she loses her 3 children. The movie is a psychological triller/ drama. The woman imagines all the time, her children alive and all grown up, dealing with lots of stuff, but those are actually her fears.
Does anyone recognize the script?
Thank you in advance & have a lovely day



I think the name of the movie is Danika(2006) but I'm not sure. Hope this helps!