Parthenope could never fathom how anyone could go without eating and not notice. First of all, because food was amazing. Second, because being hungry was awful.
"I shall strive to be noisier," she offered, taking a sip from one of the mugs. "You on the other hand, should strive to get some food in you before I find you passed out on the floor in here because you've succumbed to exhaustion or hunger or something." And Parthenope was the smaller of the two, so dragging her sister out of the lab would be a chore.
"Come on, I'll make you something. Also we have marshmallows." They were already melting into the cocoa nicely, creating that gooey foam on top that she liked so much.