The knight is a woman and now she is her mother. By the way the knight did not betray the dragon she always said she is there to kill it. It's a sad thing that the dragon was so lonely it thought to be friends with the knight.
i think knight over here is now dragon's mama. Maybe dragons just... dont care for gender? The goddess even had to remind the dragon she was a female dragon. But bruhhh she just wanted to give miss knight some flowers (