Offset is accused of trying to privately organise a three-way, while wife Cardi B was pregnant with their first child.
An Instagram model named Summer Bunni tearfully declared her involvement in breaking up Cardi and Offsets marriage on Wednesday, claiming that she was one of the women contacted by Offset.
According to TMZ, text messages allegedly sent by the rapper see him say wants Summer and female rapper Cuban Doll at the same time, back in June.
Representatives for Cardi B and Offset have been approached by Metro.co.uk for comment.
While theres also no evidence to suggest the trio went through with it, Offsets alleged mistress Summer claims she didnt know how serious his marriage was until Cardi announced their separation on Wednesday.
In a grovelling apology video published by the website, Summer says: I feel ashamed. To Cardi B, to her fans, to her family, these were never my intentions. I never meant to break up a happy home.
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She went on to say: I havent spoken to Cardi B but I would like her to know that Im a very genuine person and Im not here to break up her family or mess up what she has going on with her husband and Im very sorry.
Text messages pertaining to show Offset organising the threesome via Summer were reportedly leaked by a rapper whos had a falling out with Cuban Doll.
More: Cardi B
Though the messages date back to June 28, 2018, Summer insists that nothing romantic happened with Offset after Cardi gave birth to their daughter Kulture on July 10.
Cardi announced the shock end to her one-year marriage to Offset on Wednesday, claiming that she still had love for the Migos rapper.
The musician said things hadnt been working out for a long time as she promised to work on the friendship for the sake of their daughter.
She insisted: Its nobodys fault I guess we just grew out of love but we are not together anymore.
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