Reality television personality Aubrey O’Day is at the center of a sex scandal involving Donald Trump and Donald Trump Jr. (Photo: Aubrey O’Day/Instagram)

Donald Trump Jr. was working as an “adviser” on father Donald Trump’s NBC show “Celebrity Apprentice” when he began an affair with saucy contestant Aubrey O’Day. Was daddy Donald hitting on her at the same time?

O’Day suggested as much in scathing posts on social media. She’s hinted more than once that she has a tawdry story to tell about her experience on the show during Season 5, and it can only involve The Donald.

“I’m embarrassed to be an American,” she Tweeted on the night of Trump’s election victory in Nov. 2016.

She continued:

“I’m heartbroken. Every beautiful piece of progression that our country could have moved toward is now gone. You can be a lying, abusive piece of trash that is personally and publicly racist, sexist & homophobic and run our country.”

Then she added in another Tweet: “My story I didn’t tell is worth millions now 😉 … this doesn’t hurt me, it hurts America.”

Karen McDougal, the the 1998 Playboy Playmate of the Year, said she had a year-long affair with Donald Trump starting in 2006, a year after he married Melania Trump. (Photo by Dimitrios Kambouris/Getty Images)

But that’s not all. In October 2016, she posted an even more scathing Tweet that was aimed directly at Donald Trump.

When a fan asked her whether she’d signed a non-disclosure agreement, or could “spill the beans” on Donald, she replied:

“I don’t have a non-disclosure and trump (sic) is lucky I haven’t said what I know. He is garbage.”

O’Day supported Hillary Clinton in the election. She later deleted the Tweets.

In a 2012 interview with Entertainment Weekly, O’Day was asked if women faced discrimination on Trump’s show.

“Oh, God, how do I get around answering this the safe way?” she replied. “I think that we have a long way to go before women are respected in business the way that they should be, and that is across the board.”

O’Day finished third on the show behind Arsenio Hall and Clay Aiken. Hall suggested in a new Tweet that Don Jr and O’Day were an item.

Stormy Daniels tell-all interview was published in January, even though it’s from 2011. (Photo: InTouch)

“The year @clayaiken … and I were on Celebrity Apprentice garnered great reality TV for NBC. But we both used to say that the GREATER show, was going on behind the scenes,” he wrote.

Don Jr’s torrid affair with the reality TV personality occurred while his drop-dead gorgeous wife Vanessa was pregnant with their third child. It’s no surprise why Trump was attracted to O’Day.

The singer is blonde and voluptuous. Her Twitter page shows two women licking a mirror ball with glitter-covered tongues. The logo reads: “Dumblonde.”

Don Jr. “pursued [Aubrey]. It was him who chased her,” said a source familiar with the situation. “He told her that his marriage was already in the process of dissolving,” a source told The New York Post’s Page Six.

Their affair blossomed and continued in a series of trysts across the country. The pair would meet in various cities during their fling and wrote each other love notes, Page Six reported.

Donald Trump had a 2006 affair with porn star Stormy Daniels. Did he also hit on Aubrey O’Day? (Photo: Stormy Daniels/MySpace)

Don Jr. allegedly “fell hard” for the singer and offered to leave his wife, a source told UsWeekly.

O’Day was reportedly in love with Don Jr. as well, evidenced by the fact that she never sought to cash in on the relationship, like porn star Stormy Daniels, who had a year-long fling with Donald Sr in 2006-07.

O’Day’s animus toward Trump Sr. may be due, in part, to his effort to end the relationship. He reportedly told Don Jr. to “knock it off” and go back to his wife.

Vanessa reportedly found out about the affair in March 2012 when she discovered emails between the two. She was said to be ready to end the marriage, but was convinced to reconcile, under pressure from the family.

They went on to have two more children, before Vanessa filed for divorce last Thursday.

O’Day went on to date Jersey Shore star Paul ‘Pauly D’ DelVecchio, DJ Cassidy and Evan Ross.