As one of the most famous soccer players in the world and probably one of the biggest celebrities on Earth, Cristiano Ronaldo has understandably been a target of many who want to uncover his secrets, especially ones about his private life. However, that task may prove difficult, because according to Football Leaks and Marca, the Portuguese superstar has asked his household employees to sign confidentiality agreements.

Marca revealed that Ronaldo, through the agreement, forbids his staff from sharing anything about his private life up to 70 years after his death. If anyone fails to abide by the agreement, he or she will have to pay at least 340,000 US dollars in compensation.

One thing that interests most people about Ronaldo is the identity of the birth mother of his eldest son, Cristiano Jr. Though he talked about his son very often in public, Ronaldo has zipped his lips about the mother. According to some of his friends, Ronaldo will carry this secret to his grave.

"I hope that Cris, my son, can be like his dad. He says he is going to be better (than me), but I think it's difficult. I am very happy to have scored, for him too. He is playing for Juventus and adapting really well - it has been easier for him than for me," said Ronaldo to the press.

Since he joined Juventus in summer, Ronaldo has continued his remarkable scoring performance by taking eight goals in 14 games. He will lead "The Old Lady" to challenge AC Milan at the Stadio San Siro on Sunday.