Heh, kind of surprised this step came around already, though she clearly was working Twilight up to this. Still a bit weird for Twilight to be so irrational about something so obviously a bad idea.

Very engaging chapter, reading from Twilight's perspective here. You really believe as much as she does that she is fated to submit to Starlight, and with her final request for Starlight's hypnosis it now means Starlight has achieved full victory over Twilight. The rest of her friends are still out there, but as of now, in the battle between Starlight and Twilight, Starlight has won with Obedience is Magic.

FUCK. FUCK. FUCK!
I mean that in the expletive sense, not the literal ...
This is very bad for Twilight. This is so fucking scary. I can only think of a few stories I've ever read that blended the erotic and utterly terrifying like this one does.

Oh my ...

I feel like I should re-read this from the beginning, and pay attention to Twilight's point of view.

The slow change -- first get Twilight to worry about how she's behaving, then find out about submissive play, then get her to enjoy submissive play, then get her to go longer/deeper/stronger, until she just wants to stay submissive and grants permission for full hypnosis ...

this is incredibly hot. its turning point for sure, where Starlight has fully dominated Twi, not just in body but in mind as well. hopefully we see them come out as 'dating' publicly, maybe at the crystalling.