The Master of Hogwarts

It's ten years post war, and Severus Snape has healed. He is no longer the bitter and resentful man he was before the end of the war. The only thing he is now is slightly annoyed that a castle is trying to rule his life for him, and he's lonely. So, what will happen when said meddling castle delivers Hermione Granger and her baby daughter to his doorstep? Nothing much Canon here.