Jeremy's liquid form flowed from the digestive system to the kidneys and then, since Ty's magic made him stay in one piece, it went straight into Peter's bloodstream. From there, Jeremy flowed freely through Peter's entire body, including every organ and muscle! He went through the veins and entered through the brain and visted and affected the nervous system, which he now became a part of.
In the meantime, Peter was overcome by a faint, tingling sensation throughout his entire body. He felt as if there was an outside, foreign essence, which had entered his body through the glass of water, which he had just consumed, which had now taken residence inside of his body. It had passed through everything, and it had even made its way into the brain, where it had picked up on all Peter's senses, his memories, and his thoughts.
While Peter was just sitting on Ty's couch in the living room, watching a movie on TV, he looked down and suddenly noticed his hand moving on its own. Then his other hand moved. His eyes looked down, and his nose and moved began to move as well, without him wanting them to move. What was going on?
"Wow... I'm inside of his body... For real!" Jeremy's voice spoke through Peter's mouth.
"Hey! What the heck?" Peter wondered out loud. "I didn't say that!"
Ty just looked on at his cousin with a wide grin on his face. He began to understand what the effects were of Peter having drunk the glass of water which contained the liquid form of Jeremy's body: Jeremy had merged into Peter's body.
"Whoa! I'm using Peter's body! I can use his hands... His legs..." Jeremy's voice spoke, coming from Peter's mouth.
Peter looked down and saw his legs move a bit, when his hands clasped together and rested in his lap.
"Is that Jeremy? The kid next door?" Peter asked him.
"Yeah! It's me!" Jeremy replied.
"Where are you?"
"I'm right here! I'm inside of you!" Jeremy responded.
"I think you two have merged together..." Ty noted. "Jeremy has joined with you into your body, Peter!"
"You mean... I gotta live with Jeremy living inside of me from now on?" Peter asked.
"Yeah... Until I pull him out of you!" Ty explaned.
"Oh man... How am I gonna go on a date now?" Peter groaned.
"We'll go on a date together!" Jeremy said. "We can do that!"
"Oooh boy...." Peter signed. How was he going to explain this to his girlfriend?