The Fertile Algorithm

Cecilia is fed up with her husband, who's not only forgotten their date but also their anniversary. However, their marriage-and the life of Blaine, the scrawny technician who just happens to be upgrading their internet service-is about to take a turn when there's an explosion in their backyard. Something has crash-landed. Up close to the metallic wreckage, the three can only guess what it is. An undetonated warhead? A satellite fallen out of orbit? A rocket part? There's a screen that mentions something about scanning for lifeforms and breeding protocols right before Blaine and Cecilia's husband, Vito, are zapped by a beam of energy.
Now Blaine's suddenly growing huge muscles. And Vito's becoming softer and curvier. Also, the neighbors are subjected to the fallen object too, including a college woman who sprouts a new, thick feature. With no one coming to claim the device, the targets and transformations start to multiply...