Emily Blunt reluctantly addresses Michael Buble cheating rumors: 'It's complicated'

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Emily Blunt Devastated Michael Buble With Breakup

Well, this is awkward.

In a sit-down with Howard Stern on Wednesday, Emily Blunt reluctantly fielded questions about ex-boyfriend Michael Buble. The former couple split in 2008 after three years together amid rumors of infidelity on Buble's part.

WATCH: Michael Buble Is Expecting Baby No. 2! See the Adorable Reveal

"I don't know, it's complicated," Blunt said when asked about the cheating rumors, exclaiming: "I'm going red!"

The Sicario actress did have kind words for her former flame, telling Stern that the pair "had a good time" and that she still loves his family.

"I never want to talk about it," she said of the relationship before eventually declaring: "I can't do it."

Buble has been open about his relationship missteps in the past, telling Canadian entertainment show, eTalk, earlier this year, "I was a jerk and I was careless and reckless with the hearts of women I was with."

See Emily Blunt with hubby John Krasinski:

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Emily Blunt reluctantly addresses Michael Buble cheating rumors: 'It's complicated'
BEVERLY HILLS, CA - AUGUST 13: Actors John Krasinski and Emily Blunt attend HFPA Annual Grants Banquet at the Beverly Wilshire Four Seasons Hotel on August 13, 2015 in Beverly Hills, California. (Photo by Frazer Harrison/Getty Images)
NEW YORK, NY - OCTOBER 08: Emily Blunt and husband John Krasinski pose at The Opening Night of the MTC production of Sam Shepard's 'Fool For Love' on Broadway at The Samuel J. Friedman Theatre on October 8, 2015 in New York City. (Photo by Bruce Glikas/FilmMagic)
TORONTO, ON - SEPTEMBER 11: Actors John Krasinski and Emily Blunt attend the 'Sicario' premiere during the 2015 Toronto International Film Festival at Princess of Wales Theatre on September 11, 2015 in Toronto, Canada. (Photo by George Pimentel/WireImage)
LOS ANGELES, CA - JANUARY 15: Actors John Krasinski (L) and Emily Blunt attend the 20th annual Critics' Choice Movie Awards at the Hollywood Palladium on January 15, 2015 in Los Angeles, California. (Photo by Tiffany Rose/Getty Images for Pol Roger Champagne and 1928 Prosecco)
John Krasinski, left, and Emily Blunt arrive at the 6th annual Governors Awards at the Hollywood and Highland Center on Saturday, Nov. 8, 2014 in Los Angeles. (Photo by Chris Pizzello/Invision/AP)
Emily Blunt, left, and John Krasinski arrive at the 72nd annual Golden Globe Awards at the Beverly Hilton Hotel on Sunday, Jan. 11, 2015, in Beverly Hills, Calif. (Photo by Jordan Strauss/Invision/AP)
LOS ANGELES, CA - JANUARY 15: Actor John Krasinski and wife actress Emily Blunt arrive at the 20th Annual Critics' Choice Movie Awards at Hollywood Palladium on January 15, 2015 in Los Angeles, California. (Photo by Jon Kopaloff/FilmMagic)
NEW YORK, NY - DECEMBER 07: (EXCLUSIVE COVERAGE) (L-R) Jon Hamm, Jennifer Westfeldt, John Krasinski and Emily Blunt pose at The Opening Night After Party for ''Elephant Man' on Broadway at Gotham Hall on December 7, 2014 in New York City. (Photo by Bruce Glikas/FilmMagic)
HOLLYWOOD, CA - NOVEMBER 08: Actor John Krasinski (L) and actress Emily Blunt attend the Academy Of Motion Picture Arts And Sciences' 2014 Governors Awards at The Ray Dolby Ballroom at Hollywood & Highland Center on November 8, 2014 in Hollywood, California. (Photo by Steve Granitz/WireImage)
VENICE, ITALY - SEPTEMBER 26: Emily Blunt and John Krasinski are seen on September 26, 2014 in Venice, Italy. George Clooney is set to marry his lawyer fiancee Amal Alamuddin this weekend in Venice where they met. (Photo by Robino Salvatore/GC Images)
BEVERLY HILLS, CA - JANUARY 13: Actors Emily Blunt and John Krasinski arrive at the 70th Annual Golden Globe Awards held at The Beverly Hilton Hotel on January 13, 2013 in Beverly Hills, California. (Photo by Jeff Vespa/WireImage)
SANTA MONICA, CA - JANUARY 10: Actors Emily Blunt and John Krasinski arrive at the 18th Annual Critics' Choice Movie Awards at The Barker Hanger on January 10, 2013 in Santa Monica, California. (Photo by Jeffrey Mayer/WireImage)
SANTA MONICA, CA - JANUARY 10: (L-R) Actors Emily Blunt, John Krasinski and Joseph Gordon-Levitt attend the Critics' Choice Movie Awards 2013 with Champagne Nicolas Feuillatte at Barkar Hangar on January 10, 2013 in Santa Monica, California. (Photo by Tiffany Rose/WireImage)
TORONTO, ON - SEPTEMBER 06: Actress Emily Blunt (R) and husband actor John Krasinski attend the 'Looper' opening night gala premiere during the 2012 Toronto International Film Festival on September 6, 2012 in Toronto, Canada. (Photo by George Pimentel/Getty Images)
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WATCH: Emily Blunt and John Krasinski Are Looking Forward to More Kids, but When?

But for Blunt, Stern had even more uncomfortable questions in store for their interview -- though she was surprisingly forthcoming when asked about whether an actor had ever become aroused while filming a love scene with her.

"Once," she confessed. "I think it's just better to laugh about it."

Though she wouldn't name names, Blunt did say that her co-star wasn't famous.

"I think the reaction was, we were filming and they shouted, 'Cut,' and I went, 'Oop!' and he went, 'Oop! Sorry.' And that was it ... We laughed about it, because I don't want him to be embarrassed. I think that would be unfair if I was like, 'Oh my God!'"

Asked whether she would go home and tell her significant other about the on-set encounter, Blunt's response was swift: "Oh God, no."

Today, Blunt is married to fellow actor John Krasinski and together they share a 1-year-old daughter named Hazel.

WATCH: Emily Blunt Talks 'The Sad State of Affairs' of the Movie Business

On-screen, Blunt plays an FBI agent opposite Benicio del Toro and Josh Brolin in the Mexican border drama, Sicario. In her interview on Wednesday, the 32-year-old also revealed that the film's original script called for her to get naked.

"We didn't agree to do it," she said, bluntly referring to we as "my t**s!"

"We're not doing it!" she declared with a laugh, noting that, "Benicio backed me up. It was a scene between he and I that was rewritten."

In an interview with ET earlier this month, Blunt opened up about the rumors that her role had almost been changed for a man.

"It was never going to be rewritten," she clarified, before explaining, "But a financier approached Taylor Sheridan, the writer, and said, 'If you make her a dude, we will up your budget.'" She smiled flatly, "The sad state of affairs of this business."

See the interview in the video below.

Emily Blunt Says 'Sicario' Would've Had a Bigger Budget If She Was a Man

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