So, as y'all can probably guess, I want to give out as much information as we can as quickly as possible. I feel it's far safer that way.
Thus, when it becomes relevant, here's what I'd like to say:
Mami:
[] Tell her about the witch bomb.
[] Tell her about the extent of our meta knowledge, and note our concerns with it.
If we want to completely reveal things to Madoka and Homura, here's what I'd say:
Madoka:
[] I want to tell you something, a very important something, but I'm scared. I'm afraid that if I do you won't be you anymore. That you won't care about your friends and family, or, even worse, feel or be as though you CANNOT be around them. Not thinking the same, being unrecognizable. But I'm not sure if this will happen, or if it even matters. Do you want me to tell you?
-[] If "yes", tell her EVERYTHING.
Homura:
[] I want to tell you something very important, but I'm scared. I'm scared that if I do you won't be you anymore, that if I do your goals and love will shift to the point of complete obsession and madness. But I'm not sure if this will happen, or if it even matters. Do you want me to tell you?
-[] If "yes", tell her EVERYTHING
Two things to note:
Yes, I know that things could go horribly wrong. That's why there's a conditional there.
I didn't put much detail there. Didn't make it too elaborate. Why? Well, we've discussed it enough on the thread to make such a thing unnecessary. These are a representation of Sabrina's thoughts, so there's no need to restate things.