"I don't think she intentionally wanted to kill Wendy. She was more jealous about Peter Pan grow an attraction towards another female. She's more of a jealous character than a villain."
Considering the fact that if Facilier's plan to trick Lottie into marrying Lawrence had actually worked, they would've possessed the souls of every inhabitant in New Orleans. Facilier was just a pawn in their game and in the end they sacrificed him.