Donald Trump Jr.’s new socialite girlfriend and his ex-fiancé were forced to share a room Sunday night as they both attended pre-inauguration events.

Bettina Anderson, 38, was with her new beau seen in a gorgeous dark ballroom dress at a candlelight dinner for President-elect Donald Trump at the National Building Museum on January 19.

She had made her political debut earlier in the night, appearing in a Trump family photo as they gathered for a fireworks display at Trump National Golf Club in Sterling, Virginia ahead of Monday’s swearing-in ceremony.

Meanwhile, Don Jr’s ex-fiancée Kimberly Guilfoyle, 55, posted a photo on her Instagram of her at the same dinner wearing a sleek white dress.

She was also seen at the Republican-centric Hispanic Inaugural Ball the night before, standing next to her former beau.

To avoid such an awkward collision, allies of President-Elect Donald Trump had been trying to keep Anderson away.

Sources have exclusively told DailyMail.com that Don Jr’s new flame isn’t ‘MAGA enough’ and her notorious party girl reputation in Palm Beach doesn’t mesh well with the first family’s A-list Mar-A-Lago clientele. 

She had maintained a relatively low profile since DailyMail.com exclusively revealed her relationship with the former first son last summer. 

Don Jr’s ex-fiancée Kimberly Guilfoyle, 55, posted a photo on her Instagram of her at a candlelight dinner for US President-elect Donald Trump wearing a sleek white dress

Bettina Anderson, 38, was also seen in a gorgeous dark ballroom dress at the dinner

Sources have exclusively told DailyMail.com that Don Jr’s new flame isn’t ‘MAGA enough’ 

But Trump’s inauguration will mark the new couple’s first public event. 

Guilfoyle will also be there, and – sources say – is expected to be seated near the family in her new role as the US ambassador to Greece.  

‘Anderson is supposed to be there, so there will be some tension if both she and Guilfoyle are in the room,’ Kelly Laco, Executive Editor of Politics for DailyMail.com and host of a new podcast, said. 

‘But from what I’ve seen and from what we’ve heard from sources, the two, Don Jr. and Kimberly, still have a cordial relationship… 

‘She was posting for his birthday recently, sharing pics of herself with their family and the kids, sort of a big blended family with his ex-wife.’

Welcome to Magaland’s first episode, also revealed who is expected to sit near Trump – especially as the ceremony has been moved inside the Capitol due to extreme low temperatures Monday. 

Among the VIP guests will be many names who seem to either no longer be hiding their support for Trump, or have switched sides to the GOP, including Amber Rose and performers Carrie Underwood and Billy Ray Cyrus. 

The nation’s tech giants, including Mark Zuckerberg, Jeff Bezos, Sam Altman and Elon Musk, are also expected.

Guilfoyle was also seen at the Republican-centric Hispanic Inaugural Ball the night before, standing next to her former beau

Anderson had maintained a relatively low profile since DailyMail.com exclusively revealed her relationship with the former first son last summer

‘The “tech oligarchy,” as Joe Biden seemed to call them in his farewell speech, will all be there supporting the new president,’ chief US reporter Germania Rodriguez Poleo said on Friday’s episode of Welcome to Magaland. 

‘They are all going all sitting together, kind of representing this new tech American power.’

But there are also some notable people who have chosen not to attend, such as Michelle Obama and Nancy Pelosi, and the first episode of Welcome to Magaland dives into their possible reasons as well as rumors of trouble in paradise for the Obamas.