Coronation Street have been thinking about this story line for a while I reckon, I was sure they were going to run it when blonde Becky discovered she couldn't have children due to uterus problems when married to Steve McDonald and then her sister appeared out of the blue from Spain.
They also were going down the IVF road with Jane Danson who plays Leanne Battersby, but seem to have dropped this know Peter has run off with Carla.
It makes interesting viewing but I think it would have been more fun if they had made the Mother of the prospective father the surrogate as she looks younger than the lot of them, and she has adopted a child, maybe that will be the twist in the tale ...