Miriam O’Callaghan has been doing one thing since she was a schoolgirl that “no one can believe”. Catherine Connolly and Heather Humphreys with Miriam O’Callaghan and Sarah McInerney in the Prime Time studio. Photograph: Bryan O’BrienO’Callaghan, who is now 65, is the second of five children born to Jerry, from Co Kerry, and Miriam, aka “the real Miriam O’Callaghan”, from Co Laois. “Yeah, everyone else is at it.”Congrats to him on having his great career, but my career is my career. Miriam: Life, Work, Everything by Miriam O’Callaghan is published by Penguin Sandycove