The former Big Brother contestant explained that her little boy hasn't seen his father Matt Bates since Christmas.
She told Now: "Jack's bringing Blakely up. He comes to see us in Yorkshire for two weeks every month. He's brilliant with Blakely.
"I know I can go to the gym and he'll know how to change a nappy!"
Tweed and Hayes had a public row on Twitter in November but the 23-year-old has insisted that they are "really happy".
She added: "Me and Jack are really happy. People don't see that - they only see us arguing because we both overreact and we're feisty people."
Hayes recently said that she wants to undergo a gastric band operation in order to drop to a size six.