A coffee to apoligize for something you didn't do

The perfect plan to trick her into drinking the powder is simple. You make a cup of coffee and put the powder in. You watch it dissolve quickly. You then walk to her room; knock of course, and then let yourself in.

"I am sorry for doing all this damage, Ash. Here, I brought you a cup of coffee as a way to apologize." You timidly hold the steaming cup up.

"Fine, just put it on the table and then scram!" An arrogant smile is on her face as she points at the table beside her bed.

You stare at the ground to appear submissive while you put the cup down and hurriedly make your way out of her room. You stop hiding your smirk when you get back in your room while waiting for the powder to unfold its power.

Just as you are trying to come up with an excuse to get in her room to find out, she calls you. You instantly get worried that she noticed something strange with the coffee and she is going to kick your ass but as you come into her room, she just orders you to take the cup back into the kitchen.

You want to test if the powder does what you got told and decide to test the "not making a scene effect" first as simply going up to her and touching her could have serious consequences. You just stand in the doorframe and look at her. You figure that she won't be able to call for your parents when you annoy her by standing in her room. There are probably better ways of testing but that's the first thing that came to your mind.

She notices you standing there and decides to ignore you while waiting that you to get the cup. After a while, she starts shooting you a few glances before she turns to you. You can see that she is annoyed at you. It's clearly written above her face.

"Will you move already?" she speaks with an aggressive tone almost making you flinch. But you manage to hold your ground and don't move, surprising yourself and her. She stands up and opens her mouth to shout for your parents. As you hoped, her mouth opens and closes without producing a sound. You allow yourself to relax a little.

She notices you relaxing and quickly towards you. You expect her to storm past you to the living room to tattle on you, but instead, she comes up to you and slaps you. The hit hurts but as a reflex you hit her back in her face.

"Shit, Shit, Shit!" You are screwed. You doubt for a second that you saw the powder working before and expect her to start crying and shouting that you hit her.

But she just stumbles back and looks at you, holding her cheek, anger filling her eyes. You hold your breath as you wait for her reaction.