I knew someone who lost her children to a rich bully. She ended up as an alcoholic and died of liver failure. She loved her children, but he turned them against her. She was no saint, but she didn't deserve to never see them again. They were all she talked about and she'd get drunk and cry about them.
Rich men using the family court system to abuse ex wives and alienate children is quite common. It happens in certain closed communities as well when mothers manage to escape, but then find their children removed from them.
Nobody deserves to lose their children unless they've abused or severely neglected them.