Lily tried to follow along, to lay all the pieces together in a picture that made sense. "Coming back?" She echoed, losing much of the rest of what he was saying as she tried to fathom that. "Where had he gone that he was coming back?" Was the war still ongoing when her son was ... what, fifteen, sixteen years old? And someone not letting them use magic in a Defense class? It made no sense to her.
"I ... Remus is ... twenty one," she replied. "I have no idea how old Severus is. I'm eighteen. Nearly nineteen. A few more weeks and I would have been."
Lily nodded at his offer to fetch a drink, if only to have a few moments to try to compose herself and warp her mind around ... well, everything. The idea that she was talking to someone who was the same age as Harry ... was? Would be? Was enough to fracture her usual thought patterns.