SAN ANTONIO — An alleged sexual act resulted in a stabbing on the west side early Friday morning, police say.

Police say a man, 39, was sleeping in a home in the 300 block of West Cheryl Drive around 4:30 a.m. According to police, that's when his 41-year-old girlfriend found out that her brother allegedly paid the man to perform a sexual act with the brother's girlfriend on video.

After hearing about the video, the girlfriend allegedly stabbed her boyfriend in the chest and arm while he was sleeping. Police say about six to eight people live in the apartment.

The girlfriend has been arrested and charged with aggravated assault, family violence. The boyfriend was taken to the hospital with serious bodily injury.

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