the secret

Growing up in an abusive home, Lara never knew what real love felt like. She watched her father hit her mum on various occasions. They would quarrel and hurl abusive words on each other. This made Lara unable to trust anyone, or even love.

After the divorce of her parents, she moves to the university, apart from her mother, who is unaware of the deadly secret she is harboring.
What could be the secret she is keeping?