What does it mean when a snake enters the house?

The popular reading "Duke of Zhou" said that the dragon and snake made a fortune in the kitchen, and they had official positions. When they were snakes, they helped Long Xing nobles. A woman gives birth to a baby when she sees a snake. When the snake bit someone, she became rich. When a snake enters its arms, it gives birth to your son, swims in the water and moves in glory. When she went with others, she went into the valley, and she gave birth to a noble child. Many snakes were in charge of the affairs of the underworld.