How SOR of Tracey to keep telling Peter to get the hell out of Corrie. For one thing she cares not a hoot for Ken, except when it suits the plot of course. And for another, Her Royal Selfishness is hardly likely to dismiss the only other potential carer when Ken comes home needing round-the-clock nursing.
I predict a screeching brake-turn in which Peter, buckling under the rolling eyes and lashing tongues of Weatherfield womanhood, decides to bugger off back to Portsmouth. Tracey then has her lightbulb moment and begs, bullies and shames him into staying.