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A couple’s fight turned deadly in southeast Houston, when a man arguing with his common law wife shot her after a heated exchange early Sunday morning.

RELATED: Police are searching for a female suspect involved in a NW Houston shooting

Police say the man and woman were fighting outside their Village Way apartment building–with their children inside–when he shot her.

His mother was inside watching the kids, where his wife was found with the deadly gunshot wound.

RELATED: While waiting at a traffic light in southwest Houston, a man was shot in a random drive by shooting, and his killer remains at large

Police took the man into custody.

This is a developing story.