Looks like a kidnapping situation, why does it have to do anything with domestic violence? The main problem with domestic violence, and why it's an unsolvable

Looks like a kidnapping situation, why does it have to do anything with domestic violence? The main problem with domestic violence, and why it's an unsolvable issue, is that the victim does not want to leave (probably because of sunk costs or similar). If someone is prevented from leaving, it's kidnapping.