You knew it was only a matter of time until the rumor mill would get going. And since it's been less than a day since Miranda Lambert and Blake Shelton announced their divorce, here you go.

Multiple sources have told TMZ that Blake filed for divorce because he believed Miranda was unfaithful not once but twice.

Blake apparently heard rumors that Miranda had hooked up with fellow country singer Chris Young. Now, Chris did open up for Miranda a few years ago and the two were spotted together from time to time.

However, according to these "sources", it was not Chris but another guy who was the catalyst for the divorce. Blake filed for divorce two weeks ago because he received certain information about Miranda and this other guy and that elevated things in Blake's head from rumor to fact.

Even though the couple released a statement that the split was amicable, Blake has been upset over the last few weeks and told Miranda to get her animals off his Oklahoma ranch by Monday.