Real reason for Franco and Oxana's breakup?

Franco Formica and Oxana

Photo Credit: Thomas Morton 

Earlier I had speculated that Franco and Oxana broke up because Oxana wanted to dance with her husband, Ilia Russo but according to some rumors the actual reason that Franco and Oxana broke up was that Franco was pretty disappointed with their 4th place finish at the World Champions in 2011. It looks like after their breakup in May, Oxana may have convinced her husband to split up with his partner to partner her instead.

I don't know if this is true, but looking at Franco's face after the results of their 4th place finish, he looks very unhappy.  He's definitely not smiling. (7:46)Considering the pair was ranked 3rd in the world and consistently beat Sergey Surkov and Melia in competitions I can see why.

Please note that this is just a rumor, the only people that really know why they split is them, but I am sharing with you guys because I think there may be truth to it.