Kelly Clarksonis taking a stand and fighting back.

This filing comes after her father-in-law filed a lawsuit of his own against Clarkson back in September.

However, this revelation could explain why their relationship has come to an end.

Kelly Clarkson on the red carpet in a black gown

Could trust issues be the reason Clarkson and Blackstock have broken up?

During Clarkson and Blackstock’s marriage, there were cheating rumors, which Clarkson shot down in a 2013tweet.

“Keep hearing random rumors of me & Brandon splitting or that’s he’s cheating on me.

Kelly Clarkson and estranged husband, Brandon Blackstock on the red carpet at the Grammys

Stop with all the lying c’mon.”

The couple have two kids together, River Rose and Remington Alexander.

Clarkson just won primary physical custody of the two, according toUSA Today.

Hopefully, things will get better soon for this beloved singer, and 2021 is her best year yet.