That storyline would work for me, Calendargirl .
I don't understand the comment about political correctness. Anyone with a modicum of understanding of DV and gaslighting will know that many perpetrators get away with it precisely because they are so good at concealing their behaviour from others. In the early stages even the victims don't know that it's happening. It is insidious, and starts by making them doubt their own perception, so by the time it gets to actual violence, they are so confused that they can't fight back.
As has been said, as viewers we have far greater awareness of what is going on than any of the characters, but even so, I can't remember the first time it happened in Corrie, which is because it will have been subtle.
It's not always a case of someone getting drunk on payday and beating his wife (although that happens too, of course), but can be more about control and erosion of confidence that forces the victim into compliance.
Talking about this sort of thing on a discussion forum has nothing at all to do with political correctness, and IMO it is a good thing that it has been portrayed in the way it has - between respectable 'ordinary' people who might not be perceived as 'the type' that would be affected.