The post appeared to suggest an amicable break-up, but Khan followed up with a series of messages accusing Ms Khan of having a relationship with 27-year-old Joshua following their break-up, and labelled her a “Golddigger”.
Alongside a picture of a separate conversation, Khan wrote: “Faryal moved on quick. Always mentioned to me how much she wanted to be with another guy, from all people another boxer.
“Lol moved up in the weight classes lol. Trust me I ain’t the jealous type. No need to send me pictures of the men your talking to #disgusted.
“Left my family and friends for this Faryal. I’m not hurt but another fighter. I’m making it public. You getting the divorce #Golddigger.”
Khan’s messages did not go unanswered for long though, and Ms Khan immediately launched a series of accusations herself, with the 26-year-old defending herself and calling her husband “bad company, [a] bad role model and always around women”.
She wrote: “@amirkingkhan I’m not sure if it’s your family tweeting for you. But I’m not the one who been in the papers for cheating.
“I’m sure you left your family because they robbed you? Not because of me. Stop making false things up.
“Accusing other boxers just because your boxing career is finished. Man up Amir.
“After all these years. I’ve always defending a cheat, always stuck around for him, always had his back. And I’m called a gold digger?