That's sort of my point. If Kanti remembers Q doing things to her that he hasn't admitted to, then she won't trust him, and she'd want access to the antidote as a way of making sure she can remember anything *new* that he does to her without her knowledge.
Also, while it is most likely that she's getting antidote, I can't help but notice that in #284-286 the cotton balls with the antidote are white, while the ones in #681 are pink. It'd be a hell of a twist to discover that Laura is dealing PC.
It may be a case of keeping your friends close and your enemies closer but Kanti hasn't shown many signs of being unhappy with Q. I mean, she's been in close contact with the police; help is there if she wanted it. But I may be wrong.
Incidentally, I'm under the impression that Pink Clouds is ineffective on those who are dosed up with the antidote. Before he definitely died, Vik used PC on Laura and Amy, but I don't think they were ever under his influence.
I think the question of the colour of the antidote first became an issue in 325, when it appeared that Dani was using PC on Miriam for the "ceremony". We never got an answer on that, but I think the antidote has been pink ever since.
Just looking at Vik's night of death again I'm reminded of two recurring questions:
(1) Vik appeared to be trying his best to kill Julian at the hotel/motel. Vik sold Kanti, Katie, and Alex to someone but we didn't see who it was. Subsequently it turned out that Julian had them. What was going on there?
(2) To whom was Vik speaking before he was definitely killed?