Jill and Frank took the children in to the house hoping that whatever strage thing was happening would at least not effect them, however what ehy did not know was that since the two girls were born almost entirely due to the virus they already had a high concentration of a new virus that was created as a reaction to the two strains merging. This new virus was more of a symbiotic parasite that it was realy a virus, having such an intense connection with these two children it pretty much instilled a need to spread the virus in their brains, in exchange for giving them the ability to control not only thier own body but other people as well. having been in the water long enough to be in contact with the original virus for enough time the babies both started aging one aged to three the other only to one as it was the last to be born. Jill and Frank thinking they had managed to save their children from whatever effected them at least for the most part were relived, that is until the first daughter began to talk. She said "Thank you both for creating me and my sister, as a reward I will now make you as you were."
Neither noticed as Frank lost two years, but they did notice when the other sister also aged to three, and began to speak. She said "Thank you dear sister now let us put our dear parents back to the way they were before and then carry on our mission to spread the virus." Then looking at Jill and Frank she said " I belive you were both seven, that would make us ten and twelve respectively not old enough yet I guess, but it'll work for now" Both girsl slowly started ageing as Jill and Frank both lost years. Soon they would be ready to begin infecting everyperson they could with a version that would let them control the infected.