Does Gavin Rossdale think Gwen Stefani's romance with Blake Shelton began prior to their divorce?

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As rumors continue to swirl regarding the recently-confirmed relationship between Stefani and Shelton, a source has spoken out, claiming Rossdale feels the couple's romance has been going on for a while.

"Gavin Rossdale is 'suspicious' over estranged wife Gwen Stefani's story that she just became an item with Blake Shelton," a source told TMZ on Saturday.

Report: Gwen Stefani's Ex-Husband Gavin Rossdale May Have Had An Affair With Their Nanny

According to the source, Rossdale "smelled something was up between Gwen and Blake before their marriage blew up... [and] does not believe the timing of his divorce with Gwen and Blake's divorce with Miranda Lambert is coincidental."

"Gavin believes Gwen was painting him as a bad guy for cover ... he thinks she was worried he'd take her to the cleaners if he found out she had already hooked up with Blake," the source continued.

Meanwhile, Stefani recently gushed about her new love, Shelton, in a new interview, revealing he was a big support to her as she and Rossdale divorced.

“He’s a pretty rad guy, I have to say that,” Stefani told 103.7 KVIL’s #Uncorked hosts Leigh Ann and Courtney, according to a report by Us Weekly“There’s been loads of people that have helped me with this tragedy. There’s definitely key people that have pointed me into the right direction. Blake really helped me. [And] not to change the subject, but it’s kinda on the same subject, Pharrell was literally like a guardian angel.”