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‘Bieber’ baby mama considered putting kid up for adoption

PREGNANT PAUSE: Mariah Yeater, who claims Justin Bieber (above) is the father of her son, Tristyn, had allegedly confided to relatives that she was “pretty sure” she knew who the daddy was but wasn’t going to tell him.

PREGNANT PAUSE: Mariah Yeater, who claims Justin Bieber (above) is the father of her son, Tristyn, had allegedly confided to relatives that she was “pretty sure” she knew who the daddy was but wasn’t going to tell him. (Getty Images)

Tristyn

Tristyn

PREGNANT PAUSE: Mariah Yeater (above, left), who claims Justin Bieber (above, right) is the father of her son, Tristyn (inset), had allegedly confided to relatives that she was “pretty sure” she knew who the daddy was but wasn’t going to tell him (
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Justin’s “girl” almost gave away the golden egg.

The young temptress who claims megastar Justin Bieber impregnated her during a 30-second bathroom sex session initially considered giving up her baby for adoption, The Post has learned.

But now, Mariah Yeater, 20, is not only keeping her 4-month-old son, Tristyn, she’s launched a paternity action against Bieber, 17, that could force him to take a DNA test and pay up to $260,000 in monthly child support.

“She didn’t know if she was going to keep him,” Samra Fae Stepper told The Post at her Fredericksburg, Va., home, where Yeater holed up while pregnant for several months last spring.

“We kept asking about the father, but I didn’t press it,” said Stepper, whose brother Anthony Simeonoff is Yeater’s stepdad.

Stepper’s mom, Frances Wilson, said, “I did ask her if she was going to keep the baby. She said she didn’t know.”

“I don’t think she knew until almost when the baby was born.”

Wilson said Yeater had told her, “I’m pretty sure I know who he is,” referring to the father. “But she said she wasn’t going to tell him.”

Yeater’s stepfather, Simeonoff, who was sued by her mom in a paternity action over their son Logan in 1997, got the news of the baby’s supposed dad while walking into his local Eagles club yesterday.

“Bieber!” boomed the regulars, whom Yeater had entertained last spring with karaoke renditions of Pat Benatar and Cranberries tunes.

“I’m still in shock,” Simeonoff said, adding that he believes Yeater. “I love my grandson. If it’s real or not, I love my grandson.”

Meanwhile, The Post has learned that Yeater was busted in Las Vegas less than two months after getting knocked up.

Sin City court records state that on Dec. 21, 2010, Yeater committed battery by “slapping” a man in the face and later pleaded not guilty.

On June 16, Yeater’s lawyer asked for a continuance, noting she lived out of state and was “under doctor’s orders not to travel due to high-risk pregnancy.”

On July 6, Yeater gave birth to Tristyn, who she claims was conceived in an encounter with Bieber, then age 16, in the bathroom of Los Angeles’ Staples Center after a Oct. 25, 2010, concert.

Bieber’s camp denies he is the baby daddy.

Yeater had a sexy reputation long before her alleged Bieber bump and grind.

An official at her Las Vegas high school recalled her getting “in trouble” and being hauled into the dean’s office “three or four times” because “she wore things which you just shouldn’t wear to school to school.”

“Miniskirts, halter tops — and she had this walk.”

Yeater and her brother Logan, Simeonoff’s son, for years lived in Vegas with their granddad, Edward “Fast Eddie” Markhouse, because of her drug-addicted mom’s repeated run-ins with the law in California, according to court records there.

Los Angeles police said Yeater’s claim of the erotic encounter leaves her open to investigation for the crime of having sex with a minor.

Additional reporting by Angie Lee in San Diego