Mary might have stood down for the moment, but that didn't mean she was happy. The explanation given by the alien was less than happy.
"So we're what? Your little ant farm?"
She didn't like the idea of being an experiment. And truthfully... she wasn't sure how she felt about the prospect of not aging any further. It wasn't natural and it wasn't the way things were supposed to be. But it also meant that Johnny might not have to be alone in a few decades. She... wasn't really sure how to feel about the fact that that thought popped into her head. For now, she avoided eye contact with him and anyone else except for the alien.