Rosemary McCabe had fertility tests when she was younger and it showed she had a low egg count. She had resigned herself to the fact it could be very difficult for her to have kids. She put up this fascade of never wanting kids when in reality it was to protect her from the reality & and give her an element of control in a situation that was out of her control. She was very vocal about it, to the point Siobhan is at, harping on about it non stop. She only revealed years later what was really going on and how she actually does want kids. She moved to America, married a man over there and is now pregnant with her first child. She also has 2 stepkids! Just goes to show ye