Danielle Staub announced her engagement just one week after she finalized her divorce from ex Marty Caffrey

Danielle Staub‘s ex-husband Marty Caffrey has mixed feelings about the Real Housewives of New Jersey star getting engaged just one week after the two finalized their divorce.

“Even knowing Danielle, it’s a little surprising,” he tells PEOPLE exclusively.

Bruce Glikas/Getty; Bobby Bank/GC Images
| Credit: Bruce Glikas/Getty; Bobby Bank/GC Images

Caffrey, who was married to Staub for 10 months, says he knew Staub was seeing other people but did not hear the news of the engagement directly from her.

“If Danielle is happy, then I’m very happy for her,” he says. “I wished her the best when I divorced her, and I meant it. Danielle and I have both been dating [other people] for a while. I’ll take my time, though.”

“I’m not surprised she met someone, but I’m surprised that she got engaged so fast,” he adds. “It begs a lot of questions. Why did it need to be so fast?”

Both Caffrey and Staub are currently living in the New Jersey home they shared during their marriage. According to their divorce agreement, Staub is obligated to either purchase the $2.15 million home or vacate by April.

Still, Caffrey can’t help but laugh at the idea of being roommates with Staub and her new fiancé Oliver Maier.

“I’ll have to ask him how he likes his coffee,” he jokes. ‘I’ll tell him to pick up some milk before he gets here!”

RHONJ's Danielle Staub Gets Married in Bimini
Danielle Staub and Marty Caffrey at their wedding
| Credit: Rodrigo Varela/Getty Images

Caffrey and Staub finalized their divorce on Feb. 21, just 10 months after they tied the knot in a lavish Bahamas beach ceremony in May.

On Thursday, PEOPLE exclusively announced Staub’s plans to marry Maier.

The pair got engaged early Thursday morning while on a tropical getaway to the Cheval Blanc maison in St. Barth. They’re planning on flying back to the states to pick up her ring at Van Cleef. And they’ll say “I do” on Monday at a ceremony at the Justice of the Peace in New York City, surrounded by friends, including Staub’s pal and RHONJ costar Teresa Giudice.

Oliver Maier and Danielle Staub Credit: Courtesy Danielle Staub
| Credit: Courtesy Danielle Staub

“I’m madly in love,” Staub told PEOPLE. “I’m feeling elated and excited for the next stage of my life. I’m going to marry the man of my possible dreams and hopefully I’ll spend the rest of my life in bliss.”

Maier, who is German and French, works as the managing director of Speyside Equity, a private equity firm based out of New York City.

But he told PEOPLE he’s also the Duke of Provence, something Staub says she didn’t know about until recently. Maier said his family owns 15 vineyards in the South of France as well as two castles. Their marriage would mean that Staub would become a duchess.

News of Staub and Maier’s relationship broke Monday when she shared a photo of them kissing on Nikki Beach in front of a rainbow.