A bit of both really.<br/><br/>And yes, M'gann can read surface thoughts without going too far, but I imagine Ivy wouldn't make it that easy, also, Ivy has already put everyone around her at risk and the martian isn't going to be very forgiving about that on its own merits.  Add on top of that the fact she was losing her lunch, the civilians were trying to kill each other, and everything else that's happened, M'gann would all too happily rip Ivy's mind apart if asked, and even if she's not lol.  So yeah, not such a good idea if you want Ivy to live without drooling like a simpleton for the rest of her life.  :P