Knowing this wasn't a battle Avril could win on her own, she then had to let Lily take control over her, as they fought the females including the one that wanted to drug her with the injection syringe.
Luckily, Avril overpowered the three females and decided to flee. There's certainly no way she could still stay here when it's noticeable that danger lurked around the corner. Getting locked up while her father watched isn't an option either.
In fear that a few others might be waiting for her, if she takes the passageway. Avril then had to smash the window and literally jumped out of it before one of the females who managed to get up to her feet, could grab her.
Due to the super strength Avril possessed, she wasn't hurt from jumping off the window and landing ten feet high on the ground with her head bowed and her knuckle touching the ground, as if she was acting in some kind of superhero movie.