Madonna’s backstabbing brother, Christopher Ciccone, has started his media tour for his tell all book called Life with My Sister Madonna.

Christopher weighs in on the rumored Madonna and Alex Rodriguez (A-Rod) affair, saying he doesn’t believe the pair had an affair.

While reports are telling the story that Madonna (49) and Guy Ritchie will be getting divorced, New York Yankee Alex Rodriguez (32), aka A-Rod, has been making night-time visits to Madonna, and sneaks out "as late as midnight."

Rodriguez attended Madonna’s April 30 NYC concert. Madonna sat in A-Rod’s seats at a Yankees game on June 22, and it was the first time she ever was photographed at a Yankees game. Her son Rocco (7) also sported Yankees gear on June 25 while playing in Central Park.

Rodriguez, who is married with two young daughters, has already faced speculation about cheating. In 2007, he and a stripper were reportedly spied in Toronto, Miami and Dallas.

Neither Madonna, nor Ritchie, have been wearing their wedding rings.

Madonna’s spokeswoman, Liz Rosenberg, has released this statement rejecting reports that the singer’s marriage to Guy Ritchie is on the rocks:

"Madonna’s husband Guy arrived in New York last night to be with his wife and family, and is not in a last ditch attempt to save his marriage which does not need saving. There are no plans for Madonna and Guy to divorce."

Rosenberg also denied a published report of a relationship between the Madonna and New York Yankees star Alex Rodriguez:

"Madonna and Alex have the same manager, Guy Oseary. They have met. They know each other and Madonna took her kids to a Yankees game last week. There’s really not anything to comment on beyond that."

Rosenberg added:

"It’s nothing new that people are airing tons of dirty laundry Madonna’s way lately, much of it untrue. By the way, rumors of Madonna and Lil Wayne are quite exaggerated as well."

Yeah, maybe because Lil Wayne hits for the other team.