Iggy Azalea broke things off with Nick Young because he is expecting a second child with his ex-girlfriend, new reports are claiming.

The singer ended her engagement to the NBA player earlier this month and announced at the time that she couldn't re-build her trust in Young after cheating rumors swirled earlier this year.

But it seems that there is much more to the story now that sources are claiming Young, 31, cheated on the Aussie star with his baby mama Keonna Green.

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The real reason they split? Iggy Azalea reportedly discovered that Nick Young impregnated his ex-girlfriend before the rapper ended their engagement earlier this month

'Nick waited until Keonna was four months pregnant to tell Iggy the news,' an insider told Life & Style.

They added that he told Iggy 'he was drunk and had a lapse in judgment.'

'He said it was a one-night stand and will never happen again,' the insider explained before revealing Young is expecting another boy with the mother of his four-year-old son Nick Jr.

'This is something she can’t ignore, and it ruined their future together.' a source said.

Life & Style claim they approached Keonna last week where she confirmed the pregnancy was an accident but refused to comment further.

One big happy family: Nick and ex-girlfriend Keonna Green, the mother of his four-year-old son Nick Jr. are apparently expecting another boy. They are pictured at their son's fourth birthday party in March

Sources say that Iggy, 26, was always supportive of Young's friendship with his ex but that he 'took advantage of her trust'

Sources say that Iggy, 26, was always supportive of Young's friendship with his ex but that he 'took advantage of her trust'.

The athlete was pictured celebrating his son's fourth birthday with Keonna and other family members on March 20 this year.

Keonna poses with her hand on her belly and if the reports are true then she was likely to be at least four-weeks pregnant at the time the photo was taken.

'Nick waited until Keonna was four months pregnant to tell Iggy the news,' sources revealed. Nick and Keonna are pictured with their son in June 2015

Dailymail.com has contacted Nick and Iggy's reps for comment.

Iggy took to social media last week to confirm the couple had ended their engagement.

She wrote: 'Unfortunately although I love Nick and have tried and tried to rebuild my trust in him - It's become apparent in the last few weeks I am unable to.

'I genuinely wish Nick the best. It's never easy to part ways with the person you planned you're entire future with, but futures can be rewritten and as of today mine is a blank page.'

Young's message for fans was simply 'Single' which he posted to Twitter shortly after Iggy's heartfelt note.

An insider revealed that Young told Iggy 'it was a one-night stand and will never happen again,' The Lakers player is pictured looking cheerful at the Nice Guy in West Hollywood on Tuesday night

Back down under: Iggy, 26, jetted back home to Sydney on Wednesday

'Tried to rebuild trust' Iggy publicly announced her split from Young last week with this message posted to social media

Shortly after news of the split photos emerged showing Young's car being towed away from the Fancy singer's house but Iggy spoke out to clarify: 'I never had anyone's car towed nor did I kick nick out of "my" house.

'The home belongs to nick, I am the one moving. Thanks,' she tweeted.

On Wednesday the pop star was seen arriving into Sydney where she will be joining the judging panel on the Australian X Factor.

Young meanwhile was out painting the town red at the Nice Guy in West Hollywood.

Setting the record straight: Shortly after the announcement Iggy clarified that she was the one moving out of Young's home

Mother of his child: Green runs a kid's clothing business called Young's Playhouse

Party days: Young is pictured with Keonna in a snap from her Instagram account which she has recently made private

The Lakers player was joined by his teammate Jordan Clarkson.

While making his way out of the celebrity hotspot Young joked withTMZ about losing the $500,000 engagement ring he got back from Iggy.

'I need some insurance money' he said while laughing as he got into his luxury Range Rover.

Iggy and Nick began dating at the beginning of 2014 and got engaged in 2015, but their romance was rocked earlier this year when the 'Team' hitmaker had to suffer the indignity of a video leaking online which showed her ex-fiancé Nick admitting to his Los Angeles Lakers teammate D'Angelo Russell that he had cheated on her.