Kyrsten Sinema Boyfriend's Ex Claims Drug Abuse Amid Bitter Custody Battle

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Kyrsten Sinema’s boyfriend, Matthew Ammel, is involved in a bitter court battle with his estranged wife -- and the ex claims Matthew abused narcotics and psychedelics ... TMZ has learned.

Matthew’s estranged wife, Heather Ammel, filed court docs in March 2025 seeking custody of their three kids and child support.

In seeking primary custody of the kids, she claims Matthew has a history of “uncontrolled bouts of anger" ... adding he oftentimes expresses his anger by punching the wall of their home and “breaking and destroying furniture and screaming at” Heather “in a fit of rage.”