Shortly after Dumbledore's funeral and some days before the Order operation to transport Harry from his relative's home to safety, Remus and Tonks soon married in the north of Scotland with only witnesses from the local tavern. Lupin, same as Tonks, was sad that Harry didn't attend their wedding, because he couldn't leave the Dursleys home, due Lily's loving sacrifice when she willingly died for her only son. They were forced to marry quietly, given the general prejudice against werewolves.

Remus, to his surprise, learned that his wife got pregnant some time after the wedding.