Cas stared at the door gobsmacked. He almost couldn’t believe Jenny had just so openly defied him and slammed her door in his face. He waited for Sirius to come and place his hand on his shoulder, gently, but gravely, telling him he would handle it... but Sirius didn’t come. He knew he couldn’t let Jenny get away with slamming the door in his face, especially after he’d just told her not to slam it. "Fine, you can stay in your room then," he ordered, trying hard not to shout at his little sister. He turned and stalked to his own room, resisting the urge to slam his own door.