Generally if it’s gonna happen, CS is enough. Your plant is wrecked to the point where it’ll be toxic to smoke now, it’s pretty stressed out already. If you’ve had a bad day with the pittie and think it’ll help, though, I would certainly understand wanting to.
I’m not sure that’ll work, since the way CS works is to freeze ethylene (female hormone) production it might not be able to form seeds either. I guess it wouldn’t hurt to try, not like you’re going to enjoy smoking it much at this point.
edit: duh, of course it’ll work, that’s what selfing is. So yeah, probably the best bet if you don’t get pollen sacs from her soon.