Unfortunately, their partnership in and out of the studio came to an untimely halt when the producer passed away in January after fighting throat cancer for the second time.
"It's been a long, long journey," Dion told the magazine about Angélil's declining health.
While Dion consistently kept a brave exterior in the public eye, the 48-year-old mother of three faced terrifyingly trying moments at home.
"We were living in hope, knowing that there's no hope," she said. "There were times when I was very, very scared and he'd write me 'The end is near, I feel it.' I would go back and say, 'How can you say that? Are you in more pain?' Now I know it's possible for someone dying to feel when it comes."
When his last day arrived, Dion asked him not to worry and assured him she and their children were going to be okay. Then, she plead for him to go in peace.
"I covered him because he was very cold," she said in an interview on Good Morning America. "I took one of his bathrobes. I put one on him, one on me and I talked to him in his ear. I kissed him so much."
The loss was equally difficult to explain to the couple's three young sons, René-Charles, 15, and twins Eddy and Nelson, 5.
"The only thing I wanted is for them to say up," Dion said on GMA, referencing the Disney film, Up. "Up is a good thing. Up is uplifting."
Nearly five months since his passing, Dion has resumed many of the projects she began with Angélil at her side, including performing in her Las Vegas residency show.
"I really, really want to prove to my kids their mother is strong," she told the magazine. "He left me with all of his strength. Every day we live with him, just not physically. I'm thankful that he does not suffer anymore."
On May 22, Dion will be honored with the esteemed Billboard Icon Award at the annual award show, where she will also take the stage to perform an all too fitting rendition of Queen's "The Show Must Go On"—her first live performance since losing René.
"René always insisted the show must go on," she told People.