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HOUSTON — A love triangle took a nasty turn when a man’s new lover shot his ex-girlfriend during a fight in north Houston.

According to Houston police, a woman went to her ex-boyfriend’s apartment in the 21000 block of Aldine-Westfiled around 11:30 p.m. Tuesday, but his new girlfriend was inside.

The ex got angry and managed to get inside the apartment — a doorknob was broken — and got into a fight with the new girlfriend.

The new girlfriend was carrying a gun, and shot the ex-girlfriend in the abdomen.

The ex was taken to Memorial Hermann Hospital in The Woodlands in serious, but stable condition.

The new girlfriend waited for police and allegedly told them, “I did it.”

Police said she is fully cooperating and will most likely claim self-defense.