And... Hello again
This is a good final battle and so nice to see it fought out between two undead females

Once again, I realise that you wish to put further work into the ending of this story so I'll just pass on general comments.
I liked the change in Sarah from running scared to taking control, with the help of Promethia, and I like the way that this made a definite turn half way through the count down. I'm not too sure what Lou Ann was counting down to though or why she suggested that Sarah try the second floor. Had she envisioned cornering and killing Sarah upstairs? A twisted game of hide and seek perhaps?
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Lou Ann kneeled (knelt) beside Bob and scooped a handful of runny brains from his skull. She swallowed the gruel and smacked her lips. “Tastes like chicken.”' I liked this, very nice!
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Sarah watched as her roommate twitched on the concrete walkway below.' The fact that they were room mates could have been brought up a while ago. Maybe when Lou Ann came to the house at the power failure.
Nice ending, great to see Sarah consumed by the virus and giving herself over to the power it gives her. I'm so happy to see that the new strain can't be given the 'beauty treatment' by Eden and the human race is doomed!
Well done for getting this far. I know you feel as though you're 'burdened' with this tale but I think you'll pull it all together in time. Thanks for sharing this and keep up the good work.
MW
P.S. I'm still interested in the Part 1 paragraph if you feel like posting it.