Well its not that bad, it happened to me and made me to move out earlier.
The new flat was more conveniently priced and much closer to work. a mile and a half. Walk-able in our times.
It's understandable if you move out early if that's happened to you, because it's certainly not ideal for a parent to demand rent from their child just because they live with them. Children are a blessing to parents, and parents won't be lonely if they have children living with them, especially if the child already has a job that earns money, which can also help them a bit because the child has an income. So it seems odd that a parent would intentionally demand rent from their child just because they live with them.