Noel Gallagher's wife has claimed that Liam has never met their son.
Sara MacDonald has admitted her fears that Liam could turn on 12-year-old Donovan and Sonny, nine, amid the toxic family feud.
The 48-year-old said she has to stop her boys from searching for reports on the Oasis stars' spat so they don't find "horrible" reports.
She told Vogue magazine: "Donovan's new school friends can't understand why he's never met his uncle and he has started Googling things.
"I've said 'You have to stop. You are going to read horrible things about us.' I don't want my boys to think that's a normal relationship between brothers."
The singer previously said in a newspaper interview that he "didn't care" if Sara, Noel or his "f****** kid" Anais, 18, were abused on social media.
Responding on Instagram, Sara said: "His 'f****** kid'? You mean your gorgeous niece, you deplorable w*****
"Please god (you) have dropped dead by the time my kids are on social media."
Sara now admits she's particularly worried because Liam has targeted Noel's daughter Anais, despite knowing her when she was a child.
She added: "(Anais) had a relationship with Liam growing up...and for your uncle to publicly refer to you as 'his f***ng kid.
"I think to myself how much longer before he goes for Sonny or Donovan?"
It comes after Liam blamed Sara for stopping an Oasis reunion.
A fan tweeted him, asking: "Hi Liam, do you know why Noel hates oasis reunion so much??????"
Liam responded: "I've told you before he's rite up for it but you know who won’t let him as she doesn't like oasis music [sic]."
