[take] liberties

to act in a way that is overly familiar or inappropriate without permission or proper authority

He took liberties with the company's expense account, spending money on personal items without authorization.
She felt uncomfortable when he took liberties with her personal space, invading her boundaries without permission.
He took liberties with the truth, exaggerating his accomplishments to impress others.
The director took liberties with the script, making changes that altered the meaning of the original story.
He took liberties with his power, using his position to exploit others for personal gain.