I am not sure about this. It's nice to see Mary getting a meaty storyline but she's not long out of a relationship that emphasised the fact that it was Mary's first time. No doubt if this fails, the twins will be axed, the storyline forgotten about and Mary will never mention them again...in true Corrie style.
I had high hopes for Kate Oates at Corrie, but it still all feels a bit Blackburn for my liking. The Platts being overused, that ridiculous stunt, Maria being accused of killing Caz when there simply is no evidence to suggest otherwise, she wasn't even missing 24 hours before the police got involved. Now Mary is being retconned??? This story better be good, it better have depth and it better not just last a week, then be completely forgotten about.