Remus finishes the album and wraps it just in time to place it under the tree before his mother comes in, followed soon after by Minerva McGonagall. Remus invites them both in, since Sirius is still cooking, and they sit in the sitting room for a bit chatting and catching up. Professor McGonagall, it turns out, has met his mother once or twice, when Remus was first entering Hogwarts, and so the conversation revolves predominantly around the two getting to know each other better and learning what has happened in the years past. Including, apparently, McGonagall—sorry, Minerva—losing her husband, who Remus did not know she even had. The two women seem to bond over being widows, and Remus awkwardly excuses himself to check on Sirius, because although Remus has lost many, many people in his relatively short life, he has yet to have  had a long-term life partner, much less lose him (or her).