Erik kept struggling under Tomtom to separate from him and his cock, but to no avail. After Lisa had touched his right hand and it had vanished, she continued up his arm, slowly letting it vanish from existence. It was hindering him to struggle with Tomtomīs body as with only one arm and hand he couldnīt push him that much. When Lisa reached his right shoulder her touch vanished and he heard here moving around in the room. Then she started the same process with his left hand and arm, letting it vanish too.
The merging itself felt terrible slow to Erik. His lips were itchy for some time before he realized that they had merged already, hindering all of his escape attempts. After all, how could he escape when he was already partly merged?
Lisa still enjoyed watching Erikīs struggles while he changed. She saw him trying to stem his feet into Tomtomīs belly, another attempt to push him away. Sighing, she grabbed Erikīs right foot, and like his arms and hands it too vanished to the touch. She moved up his leg until she reached his pelvis before switching to his left foot and leg.
When both legs had vanished completely, Erik groaned in pain as Tomtomīs body was now pressing down with little he could do against him. "Tomtom, please roll around. He canīt escape any longer, but I want to see him while he changes further." It was a little relief for Erik when Tomtom moved around and was no longer pressing him down. After checking him over, Lisa continued to mold Erikīs body, smoothing his belly button and nipples over and away before doing the same to his ass crack. She then tugged on his cock, pulling it from its position and to his now rounded ass, pointing away from it. Then, lastly, she crushed Erikīs balls with the heel of her foot, letting them vanish like Erikīs limbs had, but the pain from crushing them remained to Erik.
"No need for them anymore, after all Tomtom has his own very productive balls."
Erik tried to scream around Tomtomīs cock when Lisa had crushed his balls, but it was muffled. But his try to open his mouth resulted in Tomtomīs cock growing inside, taking more room. When it touched his teeth they turned into soft flesh, while his tongue started to lick all around the cock, pleasuring Tomtom even more while Erik tried to gag for the rancid taste.
His body slowly started to shrink down on Tomtomīs cock, which in turn pushed his insides away to make room in him. Said insides like his bones and muscles simply vanished like your limbs had before. The same applied to most of his organs. The only organs that remained in Erikīs body, even when squished against the cock were his heart, pulsing to further pleasure Tomtom, his still licking and moving tongue, which moved freely all around inside his body, and his brain, so he could stay aware of his new position.
Erik had closed his eyes in the vain hope to no longer see Tomtomīs hairy balls when he started shrinking, but Lisaīs plans were crueler to him. When his closed eyes vanished from his body he suddenly could see again, just like he never closed his eyes. The same applied to his other senses. He could still smell Tomtomīs rancid genitals without his nose in place, as it had vanished some time ago, as well as hear everything without needing his ears.
Erik had been reduced to the cock of his former pet rat and was doomed to pleasure him with his tongue and heart while feeling the misery by having to see, hear, taste and smell him forever. And there was still the pain from his no longer in existence being crushed balls.
Shortly after Erik had finished shrinking on Tomtomīs cock, Tomtom cummed for a full minute. All Erik wanted was to gag at the taste pushing through his body and out his own cock, with was now the cock-head of Tomtom. The expanding of his body was rather painful to Erik, but he was sure Tomtom couldnīt feel his pain.
Lisa then kissed the tip of Tomtomīs cock. "Finally finished. Letīs take him to use now, should we, Tomtom?" she asked in a sweet voice. After she had changed the changes to go faster and watching Erikīs demise she herself was in need for Tomtomīs cock inside her.
And with that, they started to have sex, much to Erikīs horror. And he later realized that while both Tomtom and Lisa slept and Tomtomīs erection had shrunk away he was unable to sleep, doomed to be awake through all that would follow.