The Journal reported that the US government suspected Kabaeva of hiding some of that money abroad, adding that US officials also believe she is the mother of at least three of Putin's children.
Rumors have circulated for years about Kabaeva's personal relationship with the Russian leader. Russian newspapers have dubbed her "Russia's First Mistress" and even "Secret First Lady".
Kabaeva began her international rhythmic gymnastics career in 1996 and went on to become one of the most decorated athletes in the sport, winning two Olympic gold medals