Madonna's brother Christopher Ciccone knows he will reunite with his superstar sister, but he's terrified it won't happen until the funeral of their beloved grandmother Elsie Fortin.

PHOTOS: Madonna, Before She Was Famous

Elsie, who is 99-years-old, helped raised Christopher and Madonna after their mother died when they were young.

Madonna's brother Christopher Ciccone has admitted that his superstar sister's obsession with younger men is in danger of becoming "creepy", RadarOnline.com is exclusively reporting.

PHOTOS: Madonna Strikes A Pose For D & G

Ciccone -- who has not spoken to Madonna since he wrote a tell-all book, Life With My Sister Madonna, three years ago -- has been left bemused by her dating habits since her divorce from British director Guy Ritchie.

Nadya Suleman has been called plenty of things over the years -- just not "author".

Octo-Mom has finished the autobiography of her less-than-typical life as the mother-of-14, including octuplets born in 2009, and the worldwide media frenzy that surrounded her since their birth.

There is only one problem: no one wants to publish the book.