I feel like your intentionally setting up Dusk and Twilight here.

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Maybe?

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Invite me to the wedding than, Dusk "baggy eyes" yawning coming coming little ones *crying little foals*

I shudder to think what you might have become without my guidance.

Giving 'Tia a bit of an ego, there! Twilight is a good pony and there is no reason (unless you plan to supply one) to expect that she would have turned evil without Celestial tutelage.

...take every precautionary measure...

SNRK

Um. Hrrrm. Is Dusk supposed to be sympathetic? The "I'm a jerk 'cos my world sucked" is laid on a little thick. He's had plenty of chance to notice that Celestia and Luna are not the same as his evil diarchs, so there really is no call to be so disrespectful. If i were there, i'd be advising Celestia to arrange a little "accident" for him before the end of the week, but i am just pragmatic like that.
What's the drug? Amanibhavam extract?

Well this Dusk is certainly no saint now that we know he was used as an assassin and not just some record clerk and handy mage. At the moment he sounds like he only follows rules and laws because it would bring the hammer down on him if he did it to specific ponies and not for fundamental belief and wellness of everyone, at which would give him the false impression he can do anything with without risk to anyone who is lower on the totem pole, at least not until is all explodes on his face. I would wonder what Twilight assessment of him will be if he doesn't eventually come completely clean to any of the princesses or the Mane 6. I would guess he would be kept under tutelage by the crown, and be placed in a far off domain where where he won't put the alicorn in any embarrassing legal incidences, or kept isolated if he does worst. He will probably need a big wake up before then.

The writing is less clunky and the characters have more of a feel of personality that I can recognize to them compared to the earlier chapters; great job on that, keep it up.

Let me think here...

1) 'Tia is only expressing the notion that Twilight might have turned out differently had she not been tutored and guided by Celestia. Id est, a roll of the dice which could come up "snake-eyes" or "boxcars". I am leaving the whole "princess ruler" out of the conversation thing here (I am not trying to be meta; Twilight already understood that she is a princess but has yet to realize that she will soon sit on Celestia's throne).

2) Okay, I am a little slow here with your remark. I am taking your "SNRK" to mean "snark", meaning that you feel a bit of overkill on the precautionary measures that 'Tia is requiring. Perhaps a bit too much, but Celestia is only trying to keep Twilight safe from any potential harm here, in an entirely motherly manner, and not merely ruler of Equestria.

3) Answer to your question: NO. I do not want Dusk to be sympathetic. He IS a jerk, period. This will leave the story to follow him as he becomes a better pony, entailing his character's growth. Have you ever read the G. B. Shaw play "Pygmalion"? In that tale, a gentleman takes a destitute flower girl and turns her into a "Lady" within the setting of Victorian England. My tale sort of parallels that play in a way but reversing the genders of both.
And yet, things aren't as black and white here, either. There is no "Romance" tag for a reason.

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Thnx for your comment. Remember that I am flying by the seat of my pants here, or in other words, sans-editor. I took several days to come up with this chapter the way it i8s after three versions, none that I found expressed the story's vector properly. I guess that I will do that for future chapters.
Recall that I am certainly not a prose writer, but a composer of music. I just feel I need to write a tale of these colorful ponies, and therefore I am. Not a big and entirely original tale (read my comment below), just a mature version. Much of Dusk's behavior is based on where I grew up, being mere steps from Compton, California, where a lot of gangster rap came from. Anf that part of my life was during the Seventies...

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Also:

What's the drug? Amanibhavam extract?

Say, WHAAA...?

Hehe, no, just a little helper to increase libido, plus some amphetamine mixture (as in, Meth). The overall effect is akin to an aphrodisiac.

And do note the "Narcotics" tag, as that was his world he grew up in.

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https://unbeliever.fandom.com/wiki/Amanibhavam
I was just making an obscure reference... I would think amanibhavam extract would probably act like a drug to equinids.