Daddy Dearest.

Her father soon opened it, saw Amy was naked and began to quickly apologize and close it again when he spotted the focusing circle on the ground. "You know you're not allowed to do ritual magic unsupervised young lady!" He said with authority in his voice. Amy mustered her best puppy dog eyes, she was caught red handed. But her dad was by far the softer parent.

Luckily for her, her father was the non-magical parent. If it had been her mom she'd have known what Amy was doing and it would be so much worse for her in the moment.

Of course had her mother known what Amy had just done she might have been able to undo it before her new line of fate set in. The rest of the story never happens and she goes on to live a happy boring normal life in college, eventually settling down with a dreamy man and raising a family of her own, juggling a successful career.
But it wasn't her magically imbibed mother who found her but her decidedly mundane father. Who missed the smell of o-zone in the room due to a light head cold.
"Let's just put this back in your mothers library and pretend I never saw... anything." he says with double meaning gesturing to his naked daughters body and the circle in front of her. "I'm just glad I came in before you did anything stupid. You didn't do anything stupid right?"
Amy nodded too embarrassed to speak.
As soon as her father left with the tome. Amy quickly wiped the chalk sigil clean from her floor. Changed into her pajamas and went to bed. Drained from the impressive amount of magic she used today. Tomorrow was another day, and the first of her new life. She was so excited she could barely sleep.