"This has been absolutely the most crazy insane scam I have ever heard of," the country star wrote on Instagram.
The couple have been married since 2017.
The singer split from Ryan Hurd in October.
The singer filed for divorce in May.
The country star cited "irreconcilable differences" & "inappropriate marital conduct" in court docs.
Jonas filed for divorce in September 2023.
The rocker and former former Miss New York share three children together.
The singer will pay her ex $1.25 million and give him half the proceeds from the sale of their L.A. home.
The couple, who were married for more than a decade, share an 8-year-old daughter.
Morris initially filed for a dissolution of marriage in October.