The Calvin Murphy sex trial has been trotting out his daughters to testify that Murphy sexually abused them. Surprise, surprise, one of the daughters learned for the first time that Murphy wasn’t her father.

HOUSTON — A secret regarding paternity was revealed Monday in the sexual abuse trial of former Houston Rocket and NBA Hall of Famer Calvin Murphy, Local 2 reported.

While the fourth daughter was testifying on the stand, defense attorneys showed her documents that state Murphy is not her biological father.

Murphy faces three charges of indecency with a child and three charges of aggravated sexual assault of a child from allegations by five of his daughters.

The 28-year-old woman cried and said she always believed Murphy was her father.

She was shown documents she had never seen before — documents signed by her mother, listing the mother’s previous husband as the father.

In an effort to convince the jury that Murphy is a good person, the defense said Murphy had always acknowledged the girl as his daughter.

“Did he ever once say, ‘You’re not my daughter?'” defense attorney Rusty Hardin asked.

“No, he didn’t say that. But it didn’t give him a right to do what he did,” the woman said.

She said Murphy molested her beginning when she was 6 years old until she was 16 years old.

She said her father would come into her bedroom with a flashlight. She pretended to be asleep because she was scared.

The woman testified that when she was around 10 years old, she told her mom about the abuse. She said her mother confronted Murphy, who accused the girl of lying, punched the wall and said nobody would believe her.

She said Murphy threatened to kill her if she told anybody that again. After that, the woman said her mother let it go.

During cross-examination, the daughter admitted Murphy had given her money from time to time after she had her own children.

Hardin asked, “Would you agree that anyone who would do what you say he did is a monster?”

“I’d say a sick person,” she said.

Family members confirmed that the paternity results came as a complete surprise.

The five daughters who made the accusations have three mothers — two of whom have passed away. The only surviving mother was called to testify late Monday afternoon.

Last Week a third daughter to testify, a Louisiana State University sophomore, took the stand after the defense finished cross-examining a second daughter in the trial.

That daughter told jurors that her father would also sneak into her bedroom with a flashlight and molest her when she was as young as 6 years old.

The prosecution attempted to poke holes in the defense’s theory that the daughters got together to make up the story by asking the third daughter how long it had been since she had talked with the two of her half sisters.

The college student said it had been years since she talked with those two sisters, who have already testified.

Local 2 reported that her description of abuse was consistent with the testimony presented by the first two daughters to testify.

Defense attorneys grilled a 23-year-old daughter Wednesday about her claims that Murphy began repeatedly molesting her when she was 10 years old.

Earlier this year, the woman denied claims that her father molested her; but, during a four-hour cross-examination on Wednesday, she told the court that she lied to protect her father.

Murphy’s daughter said she ended up telling the truth about being a victim to protect her younger sisters, who were living with Murphy.

A social worker from the 23-year-old’s middle school also testified Wednesday, despite defense objections. The woman said the daughter’s continual stories of abuse were always “consistent.”

The social worker said she felt police did not treat the allegations like other cases because Murphy was the most famous person to come out of the small town.

Murphy’s lawyers say the charges stem from a dispute over money.

Murphy’s attorney, Andy Drumheller, said three of the five daughters had been trying to claim $52,408 in death benefits left in a Teacher Retirement System of Texas account belonging to their mother.

If convicted, Murphy faces five years to life in prison for the aggravated offenses and two to 20 years for the indecency violations. His trial is expected to last another week.