"There we go," Eric said as he finished at the machine. He turned to look at little Lisa. She was still tiny and was affectionately petting TomTom. Eric reached down and gently picked the two up and returned them to TomTom's cage, which now had facilities for tiny humans and a bed for the two new lovers.
"Why don't you two have some more fun together," he said as he closed the cage and looked down at his handy work. He had made it that Lisa was TomTom's human mate. She was a special human who could be impregnated by rats. Her children would be a hybrid of human and rat. Lisa was now in love with TomTom and her old life was a distance memory.