Alyzeh posted a pic of her cutting a cake with her family.
The boxer called Alyzeh "cute" in a comment on one of her posts – sparking an exchange of chatty messages between the pair.
The flirty banter prompted fans of Khan's estranged wife pregnant mum-of-one Faryal Makhdoom to wade in, warning Alyzeh not to be a "home wrecker".
Another picture posted by Alyzeh the same day was captioned: "Seasons change, people grow together and apart, life moves on.
"You will be just fine, embrace it."
The Bolton-born brawler commented with the OK hand emoji, adding cheekily: "Past your bed time."
She replied: "Different time zone perhaps."
The boxer said: "Yup. God know who ur talking to. Btw reason I commented I have the same shirt."
Earlier today Faryal shared an image of her baby scan.
She wrote: "Alhumdulilah, my angel."
The model also joked that she was suffering from midnight cravings because of her pregnancy.
However despite the pregnancy, Faryal has told pals she will raise the child without Khan's help.
A source said: “Faryal’s announcement came as a shock to everyone involved but she doesn’t want anything more from Amir now.
“They’re back on speaking terms, trying to keep everything civilised for the sake of their daughter and extended families, but the relationship is finished.
“She has told him she will happily bring up their new child without his support, and the divorce is going ahead.
“She’s a strong woman — and the pregnancy isn’t going to change that.”
Faryal, who married Khan in 2013, turned to a spiritual leader in a bid to save her marriage with the boxer.
She has previously told Khan that she will move back to New York with their daughter if he files for divorce.
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