Westlife singer Brian, 42, welcomed his daughter Ruby in May 2021 with fiancée Danielle Parkinson.
He keep fans up-to-date as he gushes over the adorable tot on social media - but it seems like that Kerry thinks only one thing when she sees the photos.
The Atomic Kitten, who shares daughters Molly, 21, and Lilly, 19, with ex Brian, says he's a "better dad now" to his baby daughter Ruby than he was to her girls.
Discussing her feelings towards her ex, Kerry, 42, also mum to Heidi, 15, Max, 14, and DJ, eight, says even he would accept he wasn't there as much as he should have been.
She told OK! Magazine : "The older the girls have got, the more of a relationship they’ve had with Brian.
"That’s not me slagging him off, he’ll admit that himself. He’s a better dad now to Ruby and I think that hurts the girls.
"We all change. He’s older, with more patience, and I feel he is doing it better this time around – which is great. But that doesn’t stop the hurt my girls feel because of that."
Brian has meanwhile detailed plans for another child with his fiancée after miscarriage heartache.
Kerry has been talked about her former loves recently - and recalled the time she heard ex George Kay planned to inject their baby daughter with heroin before killing himself.
The mum-of-five opened up about the abuse she suffered at the hands of her late ex, who is the father of her youngest daughter Dylan-Jorge, eight, and admits he still has 'such a hold on me, even in death', following the former rugby league player's passing at the age of 39 after a drug overdose in 2019.
Kerry and George tied the knot in 2014 but their romance was blighted by abuse, with Kerry claiming her late ex would spit on her, strangle her and hit her while she was pregnant with Dylan-Jorge before telling the singer it was her own fault he was abusive towards her.
Recalling some of her traumatic experiences ahead of the release of her third memoir, Kerry admits she is aware of the fact George isn't around to challenge anything she says and share his version of events but adds how her recollections are 'all fact – and it’s my truth'.
"He was so vile to me. I’m telling you now, if George was still alive and I’d have stayed with him, I’d be dead. I would not be here today," the one-time Queen of the Jungle tells OK! magazine when looking back on her marriage with her late ex.