I'd love to see Pepper find out about the mutants first, she might even want to keep it hidden from Tony for a while due to the fact that the whole New York thing just occurred and, well, he was kind of on the brink of dying for a couple of minutes. That and I can see Charles and pepper getting along quite well, sipping tea and complaining about how complicated their lives are. That sounds good. It might make sense if Charles honours his promise never to read Raven's mind, otherwise he'd know all about the infiltration. Or he could know and feel as though if she stays long enough she might change her mind. Both are equally heartbreaking