Practical Advice How do I punish my sister/god daughter for not respecting me anymore?

I used to be very close with my younger sister, I was the one who baptized her, we got along so well. However in recent times she's been noticeably hurtful and frankly has stopped caring about what I do for her and is refusing to listen to me. Because my mother is a shitty Zoom therapist and my dad goes to work when not home, I have to be the one to wait for her to be dropped off from school. During this time there is a schedule of relaxing for 30 minutes, homework, then some online schooling for 30 minutes (15 minutes for Math and 15 minutes for Reading). During this time she has attempted to lie multiple times to get out of work, once she said she "didn't have online schooling", so I took her word for it and left early, however when my dad got home and asked her about it, she changed her statement to "I think I don't have online schooling." She did, she lied to get out of doing it and in doing so, nearly threw me under the bus. Had I not been there for unrelated reasons to say "She told me she didn't have any online schooling.", I would've gotten in trouble. The second time is when she claimed she had a break between normal homework and online school, she lied to me about it and I told her "so if I text mom will she say yes?" And initially set the timer for it. Seconds after this I received a text back saying that no, she does not have a break in between. Even when she isn't lying, she keeps getting intentionally distracted to do random things like getting a drink, putting something up, or just overall not paying attention. Me having to put her back on track gets so frequent that I am put on the brink of yelling at her. My mom says she thinks my sister has ADHD and tells me to "not tell her" but for that reason of keeping this a secret from her is why I don't believe she does and she's just being disrespectful. On multiple occasions she keeps bullying me over the fact that I don't want to go to college, something my mom told her and the reason being beyond her understanding. (College is a scam, I nearly committed suicide from people being mean to me in college, no one is going to college anymore in the modern day). Not to mention the overall disrespect I'm getting from my sister randomly. I genuinely don't care if she's 9, I've tried my best to be there for her and help her but she's been treating me poorly for awhile. I'm not willing to hear the "she's just a kid" card from anyone as I don't think it's valid anymore in modern times. Since giving my heart to her doesn't work in getting her to care about me like she used to, I've been thinking of outright disciplining her for not respecting me. The only reason I haven't punched her is because she's 9 and doing so might kill her. If she's still acting like this by 13 then I'll 100% do that, but until then, I need a way to punish her for how she treats me as everything she's been doing has been very hurtful. Part of me was thinking of getting rid of my god parent status as a sign to her that I'm starting to not love her anymore for how she treats me, but if she doesn't care about my feelings now, I feel like she won't care and my parents just might find a new person to be her god parent. So honestly I'm at a loss, so I ask here. I won't be accepting "no" for an answer and right now, the default for her bringing up college again is going to be an open-handed slap to the face since as previously established in a past thread, the consequences for hitting someone aren't actually real and thankfully a slap to the face isn't lethal to a child like a punch is. I don't want to be pushed around anymore, I want the sister I had back when she still cared, not the one who doesn't care about me, and I'm gonna do anything to get her back.

Violence against others is great, until you meet someone better at it than you, without your limits.

There are people who will shoot or stab or beat you, laugh as you lay in the street gurgling for air, and not even bother to watch you bleed to death because they’ve seen it enough times that they’re bored with it at this point. This won’t even be the biggest part of their day.

You are not one of those people.

Learn how to just walk away from people who piss you off

Genuinely tough people are a rarity. In the world, there are mostly two kinds of people; those who know how to avoid them, and those who think they’re one of them until they actually meet one. You’re in the latter category. Aspire to the former.

Also, you said that if she didn’t love you unconditionally, you don’t care about her.

Where’s your unconditional love?

You’re the adult, she’s 9.

You’re the one with responsibilities toward her, not the other way around.

What, exactly, have you done to earn her love except threaten violence when you don’t get your way?

I think you need to let someone else watch over her.

Your parents need to change their schedule
Hire a babysitter
Whatever it takes

And yes what you explained can traumatize her

Simply just false that it cant have any consequences

Sorry if I appear harsh
But this seems like the best for both of you

Hope it works out

Okay, let me make things very clear. You’re an abuser, you treat people poorly, you are the problem. And like everyone else who is the problem, you steadfastly refuse to see that and instead make excuses for your behavior.

Everybody meets an asshole once in a while, but you have nothing but conflict with literally everyone you know. That should tell you something about yourself.

You brag about threatening violence to get your way. You do this constantly. That is, frankly, disgusting. And even still, you refuse to see that you are not the good guy here.

But sooner or later, you’ll meet someone worse than you are. I really hope you come to your senses and stop thinking you are one of them before that.

And I didn’t say certain people don’t exist, I said they are rare and you are not one of them. Actual tough scary people definitely exist. They don’t have beef with literal children though.

Also, I've literally tried to do something about my violent tendencies and have yet to receive a productive response.

If I was an abuser, I wouldn't be trying to explain or "make excuses" for my actions

Yes, the issue is that you haven’t received “productive responses,“ not that you constantly try to justify it, like you have in this very thread,

What you asked for is exactly what I’m trying to give you. You want to stop without professional help, the only thing that’s going to stop you is motivation, and I am I am trying to tell you the truth about what you are doing and where that path leads in order to give you that.

But, as usual, you don’t want to hear it.

So far you have threatened to hit a literal child and wished for your mother’s death by beating, and the worst anyone has done to you is lie about schoolwork. What part of that sounds like a reasonable reaction to you?

I'm not also accusing you of being an abuser here, but i feel compelled to point out, this isn't how it works. My abuser actually did both of these things a lot. He had to, as part of the abuse, because he had a lot of unreasonable expectations, and he had to justify to us that they were reasonable, and we were the unreasonable ones for wanting to be in a dynamic with an equal power structure.

Some of that harm i did that i mentioned before was actually when he would put words in my mouth, and use me to make arguments for him to try and justify his behaviour, since it'd carry more weight coming through me than directly from him. It's called triangulation, and a lot of abusers use their victims against their other victims like that. All of that to say, abusers absolutely do try to explain or make excuses for their actions.