Myleene, 37, split from Graham in 2013 – just two months after they tied the knot. Earlier this month, the former Hear'Say singer insisted she would never remarry and run the risk of letting a man take her money.
But mum-of-four Ulrika, 47, has claimed that Myleene should be focusing on their two children, rather than making scanting comments about Graham.
Writing in her column for The Sun, Ulrika said: "i would always say the priority should be the children.
"Because whatever she now thinks of their dad – the 'former drug dealer', as she now refers to the man she once defended – on the grand scale of things it is considerably less important than the children developing a proper relationship with their father."
Myleene was thought to be worth £11 million at the time of her split from Graham, and her comments this week suggested that she lost out to him.
Speaking about marrying him without a prenup, she said: "That was as stupid as it gets. One of my girlfriends said later, 'You married a former drug dealer who wouldn't sign a prenup. What were you thinking?'
"If I'd decided to gamble with my money, I could take that, but someone taking it… No."
Now Ulrika has insisted Myleene is in a better position than most and must remember that.
She said: "Things could be worse. You could have no money whatsoever and a man who doesn't want to see his kids at all."