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When Iggy Azalea announced that she had called off her engagement to Nick Young earlier this month, she cryptically said she couldn't "rebuild" her trust in him. Now we know what she was referring to.

The Los Angeles Lakers star reportedly impregnated his ex Keonna Green, whom he already shares one child with, while he and Iggy were still together.

"Nick waited until Keonna was four months pregnant to tell Iggy the news," a source tells Life & Style. Nick apparently told Iggy that "he was drunk and had a lapse in judgment."

The two already have one child together, 4-year-old son, Nick Jr. together.

"He said it was a one-night stand and will never happen again," the source told the tabloid. "But it's too late. He is having another son!"

The magazine claimed that it caught up with the mom-to-be last week and she was "clearly expectant." When asked if the pregnancy was an accident she apparently said "yes," but quickly countered with a "no comment."

"Iggy was supportive of Nick's friendship with Keonna," the source said. "He took advantage of Iggy's trust. Iggy seemed to blow everything off."

When Nick told her about pregnancy, she couldn't take it anymore.

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

On June 19, Iggy announced she and the man known as "Swaggy P" had called it quits after two and a half years.

"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," the 25-year-old Australian wrote on Instagram. "I genuinely wish Nick the best. It's never easy to part ways with the person you planned you're [sic] entire future with, but futures can be rewritten and as of today mine is a blank page."

Nick was more forthright in his announcement, simply saying on Twitter: "Single".

Many thought the writing was on the wall for these two to split. In March, Nick's Lakers teammate D'Angelo Russell secretly recorded him speaking about other women, discussing a fling he had with a 19-year-old girl. The tape was somehow leaked.

Around the same time, Iggy told a Twitter user if there was proof of cheating, she would dump Nick, saying, "I'm not [trying to] marry a cheater."

The proof is in Keonna's belly.