Dream Lover

I like the building up but I don't like the end like I would have loved some psychology thing or idk if she was a murderer or something but just lying to lie and putting him in a mental institute ? that's just cruel and there's no justification, it's not vengeance or anything, she just want the kids and his money ? That's it ? All this complicated thing just for that ? No personal reason, no political/belief reason, nothing. I liked the way he was deceived but it leaded to nothing !