The 5th house is the house of intelligence, children, and the father's wealth. Saturn (Shani) is the planet of delay, seriousness, and hard work.
When Saturn sits in the 5th house, it creates a very strange dynamic between the person and their father. Dr. Rishi Rohit Sharma reveals that the father will constantly underestimate this person, calling them a "budhu" (fool) and believing they will never succeed.
However, this is a massive illusion. The person is actually highly intelligent and cunning. While the father thinks they are foolish, this person is secretly outsmarting everyone else ("duniya ko bewakoof banaye") and building their own empire in silence.