Viewers know that David (Jack P Shepherd) is currently hiding a devastating secret as he caused the shock road crash which put his half-brother Nick Tilsley in a coma.
The horrifying moment came after Nick was finally honest with David about sleeping with Kylie (Paula Lane) last Christmas - well aware that he already knew the truth.
Discussing what will happen when the crash secret emerges, Blackburn told Inside Soap: "It'll put Gail in a position that no mother would ever want to be in, and it'll push Kylie to the edge. I've missed bad David, and it's just so simple to get him back by having someone do him wrong!
"There is hope for Kylie and David, but while she'll be angry with him, there's also anger at herself. Kylie has seen nothing but pain and heartache.
"In her head she's a screw-up, and she'll be furious with herself for imagining she could ever have a normal life. If there's hope for Kylie and David, they must accept each other for who they really are."
Nick's (Ben Price) relationship with his wife Leanne (Jane Danson) has completely different challenges ahead as he is a changed man when he finally comes out of his coma.
Blackburn continued: "For those two, it's not going to be about that hideous Christmas night, because they both have to accept a share of the blame.
"Leanne is going to be living with a man who isn't the man she married, and may never be that man again. Nick has brain damage and when people get such injuries, sometimes their partners say, 'I'm not his wife any more - I'm his carer'. So we want to play that as realistically as possible."
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