*cough* no. Lüxia marries him as his queen after finishing up with the sister.
After Su Lüxia left the first time, the world mended itself and created a plot of itself. The protagonist is the sister, who is a pretty ruthless girl that wants to be queen after seeing Lüxia(As Queen Mother) in the first world. She didn’t hesitate to deal with the original Su Lüxia. I don’t think there was an end yet to the original storyline...?
(As the original storyline was created by the world itself, I don’t think there’s a complete ending, like the cultivation arc, so anything could happen.)