Love Square?

Fiance of one twin. Who is now dead, but his daughter is alive. Lily Black is raising her daughter, while working at Hogwarts. She believes that nothing else could make her happier. Faith Weasley-Black disagrees.
It's been three years since the Battle of Hogwarts. This three year-old girl has much up her sleeve, and a huge intelligence. So when the suitors arrive, she wants her mom to be truly happy.