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Brent Sikkema was a high-culture aficionado whose final Instagram post was a sumptuous photo of the Palais Garnier opera house in Paris.

He regularly rubbed elbows with luminaries such as Michelle Obama.

But the Manhattan art dealer — who was found stabbed to death at his home in Rio de Janeiro on January 15 — had a secret side.

Sikkema, 75, had fallen in love with and married a self-admitted male escort and, social media posts show, was a fixture on the gay scene in Cuba, Rio, and Fire Island, NY, for a time.

He was also a devoted father embroiled in a bitter divorce that began in March 2022 and was ongoing at the time of his death, according to public records and Brazilian investigators.

Alejandro Triana Prevez, 30, has been charged with Sikkema’s murder.

Police say the Cuban national — who worked as a bodyguard for Sikkema and his husband during the pandemic — made the six-hour drive from Sao Paulo to Sikkema’s Rio rowhouse, and spent 14 hours surveilling the property before he entered and allegedly stabbed the art dealer 18 times in the neck and face while he lay in his bed.

Sikkema shared son Lucas (right) with his estranged husband, Daniel Garcia Carrera Sikkema (left), a self-described former escort. The two were reportedly in a contentious divorce and, police said, Garcia had demanded $6 million for Sikkema to see their son. Brent Sikkema/ Instagram

The weapon may have been scissors, a box cutter or a screwdriver, according to Art Forum.

Sikkema’s remains were found by his lawyer, who had a key to his home.

Triana is also accused of stealing more than $30,000 in cash, which Sikkema had on hand to buy furniture for a new apartment in the beachfront Leblon neighborhood in Rio, police say.

Friends and former clients of the gallerist said they were in shock over his death and secret life.

Well respected in the Manhattan art scene, Sikkema regularly rubbed elbows with luminaries such as Michelle Obama. Instagram/Brent Sikkema

“He was a kind soul, but I had no idea about his lifestyle,” said a longtime client who had worked with his Chelsea gallery, Sikkema Jenkins & Co., which represents contemporary artists such as Kara Walker and Brazil’s Vik Muniz. “He never spoke about his husband.”

The divorce action was started by his husband, Daniel Garcia Carrera Sikkema, and Sikkema was “panicked” because Garcia would not accept an amicable settlement, according to Brazilian police, who added that Garcia also wanted a sizable settlement from Sikkema.

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Garcia’s attorneys declined to comment.

Brazilian authorities have not suggested Garcia is involved in Sikkema’s murder.

Alejandro Triana Trevez is being held as a suspect in the murder of Sikkema. REUTERS

Sikkema, who counted New Yorker theater critic Hilton Als and artist Muniz among his closest friends, married Daniel Garcia Carrero, 53, shortly before the birth of their son, Lucas, now 14, by surrogate in California.

At the time of the birth, California did not recognize gay marriage, which is why Sikkema is listed as the “mother” on his son’s birth certificate, according to social media.

Same-sex unions were legalized in the state in 2013.

“When Luc was born, California birth certificates couldn’t recognize two fathers so I became his mother,” Sikkema joked in an Instagram post from May 2016. “An honor to be in the company of mothers everywhere.”

Triana, who is Cuban, has written about his life as an escort. REUTERS

According to Rio police, Garcia had demanded $6 million for Sikkema to see their son again.

It’s not clear when Sikkema fell in love with his husband, whom he called Danny.

But Garcia claims in a Spanish-language memoir, “Ticket to Paradise: The Cuban Revolution is the Story of Broken Dreams, Losses, Misery, Terror and Lies,” to have worked as a prostitute in Cuba and Spain.

The book was written between 1997 and 1999, and published in 2006, according to an author’s note.

In a forward written for the third edition of the book, in 2014, Garcia wrote that he is a “happily married man.”

“I have a son and it makes me extremely happy to watch him grow in what I consider the best country in the world, but what’s most important is that we are far away from the communist doctrine that I was forced to adopt and adore since I had use of my reason,” he wrote.

In the book, Garcia recounts the raw story of how he was sexually abused as a child by family members and then took up prostitution to survive and escape from the Communist island.

“In order to escape the dictatorship he had to change into a dangerous man without a destiny,” reads the jacket copy of the book. “This led him to spend a year in various prisons of the Cuban regime.”

In 1997, he left the island bound for Italy, finally settling in Madrid, where he continued to work as “a chico de compania” or escort.

In his book, he writes about making enough money in three months to pay for a new house for his impoverished family in Cuba.

Sikkema’s son Lucas commented on a photo of Sikkema with artist Kara Walker: “Rest in peace dad.” Instagram/Brent Sikkema

Along with Garcia, Sikkema split his time among homes in Manhattan; Sayville, NY; Havana, and Rio — a place he called his “second home” and where friends knew him as “Brento” — according to public records and social media posts.

He lived in the lush Botanical Gardens neighborhood next door to the studios of some of the artists he represented even though he hated the heat, he said.

Triana, who is now being held in Rio, was a recent arrival in Brazil, authorities said.

Among the high-profile artists in Sikkema’s orbit is painter TM Davy (right). Instagram/TM Davy

The amateur author, who wrote a memoir that translates as “Gray Reflections on Love,” worked as a Spanish teacher and lived at the home of a family friend in Sao Paulo.

“I was shocked and hurt with all this,” the friend told Brazil’s O Globo newspaper last week. “I didn’t expect that he was capable of this kind of thing. I gave him a place to live, I helped him out. I never imagined he had that kind of personality because his mother was a doctor, someone of excellent reputation.”

According to Triana’s lawyer Gregorio Andrade, “Alejandro has brought more information that we can’t publicly reveal yet. All he wants is for the whole truth to come out.

“The story of what really happened is much more shocking,” Andrade told The Post. “I can’t speak because I will get in the way of the investigation but what I can tell you is that the investigations are now quite advanced.”

Sikkema, who had been set to return to New York City on Jan. 16 — one day after he was killed — owned three properties in Rio de Janeiro and two in Cuba.

A source told The Post that one Havana penthouse was purchased in the name of Sikkema and Garcia’s son because the American gallerist couldn’t own property on the Communist island.

Muniz, one of the prominent artists on Sikkema’s roster, declined comment to The Post this week, with his assistant saying he was “deeply affected by the tragedy” of the death of his art dealer, whom he had known for more than 30 years.

“I have spent more than 30 years of my life trying to pointlessly emulate his juggling of fearlessness, kindness, and sophistication,” Muniz said in an Instagram post. “Brent coated his flaws with humor with the same grace he hid his immense talent behind humbleness — someone whose ultimate goal was a type of humanity that could survive any imaginable context. I am shattered, shocked, and broken by his unjustifiable tragic demise.”

Sikkema was found dead at his home in Rio de Janeiro, one of several properties he owned. AP
In 2017, Sikkema posted to Instagram a photo of his home with the caption: “Luc grew up on these extraordinary stairs. It’s a good word to describe our luck he survived. Design daddies to jail!!” Brent Sikkema/ Instagram

Sikkema shared that sense of humanity with his son.

In an Instagram post from Sept. 12, 2021, he wrote that he and his son wanted 9/11 to be considered “a day of kindness.”

“We will never understand such evil that we encountered that day but we can honor those souls that were lost just by being kinder and more empathetic people,” he wrote. “I know holding onto that every day is difficult — but it’s easier than waking up everyday with a hole in your heart full of broken dreams and aspirations for a husband or wife or child you have brought into the world and lost.”

Sikkema posted this photo of himself (second from left) as a very young boy with his mother, grandmother, great-grandmother, great-great-grandmother, and his brother. Brent Sikkema/ Instagram

Sikkema’s Instagram page features photos of the couple’s son at different ages — a sandy-haired boy in a white martial arts robe at a tae kwon do class, at a museum, and standing outside the Hotel Nacional in Havana, where he was a student at the International School of Havana.

In 2019, Sikkema posted a black-and-white photo on Instagram that showed him as a baby posing with his mother, grandmother, great-grandmother and great-great-grandmother.

“Many days I carry the photo with me, and other days I have to put it face down on a shelf,” Sikkema said in the post. “Now I have a husband and a son and we are making new family photos.”

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