Bradley Cooper and Lady Gaga have both denied that they are anything more than 'good friends' but Irina Shayk suspected this was not the case.

The 33-year-old supermodel has called time on her relationship with Oscar nominated Cooper, with reports in US media suggesting they were 'just a partnership' by they finished.

It has been reported that Cooper and Shayk had been staying together for the sake of their two-year-old daughter Lea De Seine Shayk Cooper.

Radar Online has stated that the split could be down to Gaga after all, and that Shayk was deeply unimpressed with how Cooper interacted with her.

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Shayk has allegedly levelled at Cooper that he was having an affair with the Oscar winning singer.

A source told Radar Online: "Bradley’s relationship with baby mama Irina began to really fall apart when he started filming with Gaga and she accused him numerous times of cheating on her with his co-star.

"Ever since then, Irina has not been able to trust Bradley at all.”

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The source continued to claim that Shayk and Cooper 'would fight whenever they were together' and that their relationship 'was a mess'.

Shayk was reportedly 'threatened' by Cooper's professional relationship with Gaga and often thought it was becoming more than just working together.

The source said that Shayk found it inappropriate that Cooper 'started spending time with Gaga at odd hours'.

(Image: Lia Toby/WENN.com)

The intimate Oscar performance of Shallow did not help Shayk's insecurity, despite Cooper and Gaga insisting that they were just in character as Jackson and Amy from A Star Is Born.

Gaga said: "People saw love and, guess what, that’s what we wanted you to see. This is a love song.”

(Image: SplashNews.com)

The timing of Gaga breaking off her engagement with Christian Carino, just before the Oscars, has been seen as a ticking countdown to Cooper doing the same with Shayk and now all eyes are on whether the 'good friends' will decide to make it more than that.

Cooper and Gaga have already stated that there are further projects that they will work together on and it remains to be seen whether this will blossom the romance that many feel is inevitable.

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