Gavin Rossdale is questioning his former singer wife Gwen Stefani's newly-kindled romance with Blake Shelton, which came hot on the heels of the new love bird's respective divorces.
The source informed that the English musician was very much suspicious over the timing of his former spouse and her newly-found lover's relationship and has speculated that the two become more than friends on the sets of 'The Voice', which was before ending the marriage, New York Post reported.
The source added that the 50-year-old lead singer of Bush believes the two kept their affair under wraps because his former wife was worried he would fight her for more money in the divorce if he knew she'd cheated.
Shelton filed for divorce from his wife of four years, Miranda Lambert, on July 20; Stefani split from Rossdale less than a month later.
