Peter Andre's kids, Junior, 13, and Princess, 11, star in the professional shots with her four-year-old daughter Bunny, whose dad is Kieran Hayler.
Katie, 40, defiantly shared a glimpse of the range with fans on her Instagram story and said the lines will be on sale in April.
But it comes after she slammed Peter for banning Princess and Junior from taking part in shoots and filming for her show, My Crazy Life.
She called him a "selfish hypocrite" live on Good Morning Britain as she hit out at her ex for not letting their kids appear on her reality series.
Speaking about her tumultuous life, including her recent drink-driving court case, Katie wasted no time in taking aim at ex-husband Peter, 46, when host Piers Morgan asked about her love life.
She said: "Husband number one, I'm doing my reality show at the moment.
"I'm actually really cheesed off with Pete at the moment because when people are watching my show they're going to think where's Junior and Princess?
"He won't allow me to film with them, he won't allow me to do photo shoots with them, he's being such a hypocrite."
Katie and Peter were married from 2005 until 2009 and together they have son Junior, 13, and daughter Princess, 11.
The children have both previously featured in their parents reality shows following their split, however Pete hasn't had his own programme since Peter Andre: My Life in 2013.
Last year, Peter had the pair come and live with him and wife Emily temporarily while Katie sorted her life out, but it seems things are still not amicable between the former couple.
She continued: "Unfortunately these days you need both parents permission, so I just want to put it out there that he's really selfish and the kids miss out on it. I don't know why he's doing it."
It came after Piers, 53, didn't hold back as he spoke to Katie, saying: "You seems to be, from the outside, one of perpetual chaos, and yet you've got all these kids. How do you equate the two?
"Is there a point where you look in the mirror and go, 'you know what? I need to grow up'? I'm serious."
Pausing a second before replying to Piers' blunt question, Katie said: "The thing is, I believe in living each day as if it's your last.
"My life hasn't been mapped out… anyway, what is perfect? I've got five kids by three different guys, and that's just the way it is. There is always a drama in my life. Always."
When Piers said they would ask Pete for his response to her accusations, she added in a further dig: "And it would be nice for him to follow his online trolling thing as well."
However Piers and co-host Susanna Reid couldn't get her to elaborate on her comment as they had ran out of time and Lorraine's show was about to start.
Katie has been busy filming her reality show, My Crazy Life, in recent weeks and her three other children, Harvey, 16, Jett, five, and Bunny, four, all feature.
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