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While many are thrilled over Gwen Stefani and Blake Shelton's newfound relationship -- not everyone's excited about these love birds, namely Gwen's ex Gavin Rossdale.

On Nov. 4, a rep for the "No Doubt" singer confirmed that she was dating the country crooner after reports and photos surfaced of the two hit-makers getting close over Halloween weekend.

However, TMZ is reporting that Gwen's British rocker ex is "suspicious" of the new couple's romantic timeline, and he thinks there was something going between "The Voice" coaches before both of their marriages crumbled.

The outlet is claiming that Gavin, who was just spotted still wearing his wedding ring, doesn't buy that Blake's divorce from Miranda Lambert just so happens to coincide with his own marriage meltdown.

The source also says that Gwen is trying to paint Gavin in a bad light so that she doesn't get cleaned out in the divorce since she's the breadwinner of the family.

TMZ is also reporting that their sources say that Gwen is the "control freak" not Gavin, claiming that she wouldn't let him go on tour out of fear that he would cheat on her.

The source says that as a result of not being able to tour, Gavin's income was greatly impacted. One source says, "She just didn't let him work."

Whatever is going on with the former flames -- it's gearing up to be an ugly split.