My headcanon: Willow isn't all THAT into Amity, they're closer to friends than girlfriends; she's just happy to be included. Amity and Luz's light and fluffy love behind closed doors is a nice break from the monster killing. Although, when it comes to said killing, Luz's skill with the bat is a total turn on.
word of kind of god: you really put it past these idiots to not expect luz and willow to be the two to get married for the sole purpose of shock factor? and amity to *not* be on board with that idea? /hj
Azura Noceda-Blight is with her grandmother Camila. Luz and Amity would be totally irresponsible to leave their child around such violence!... Until she learns to walk, at least.