A fan commented on one of Hawkins' post, saying, "Odell got your bm [baby mama]."
Not missing the chance to take a dig, he wrote back, "Good luck to him. He will need all the help he can get dealing with her. I don't envy him at all."
The fitness guru then deleted the comment.
Hembrow, 24, and Beckham Jr, 26, have been flirting in digital terms with the classic "liking" of each others posts on Instagram.
Meanwhile, Hembrow and Hawkins ended their four year relationship back in June. They share two children, son Wolf and daughter Saskia.
The Instagram model, who was previously engaged to Hawkins, shared that she was not dating as she was focused on her kids.
"Just focused on my babies & my business. No man needed."