Rebirth of a Female Master: I got a sister after my father remarried

(A pure love, non-toxic, sweet story about daily life, without any extraordinary settings) Gu Qing was reborn into a seemingly real urban world, and everything was similar to his previous life.
But the biggest difference is the reversed relationship between men and women. Women are responsible for the outside world and men are responsible for the inside world. Women marry men and women have to pay a gift.
And with my father's remarriage, I suddenly have a beautiful sister, but her personality seems a bit dull? And why does she always stare at my feet from time to time...