As she slipped Tim into her gym shoes, he hears Monica say "Sarah wouldn't be able to appreciate how fitting this form is for you. So I better just keep you for myself." She feels him shiver with fear, and with a chuckle adds "Don't worry. I'm sure you'll get used to it... after a few years." With that, she slips the shoes onto her feet. Unfortunately for Tim, she had worn sandals to the house, so there were no socks to protect him from her rancid soles. She stomps a few times, just to drive into his head what his new job is, then saunters back downstairs. As she passes Sarah in the living room, she says to her "Sorry sis, I gotta get going. Long day tomorrow."
Sarah clicks off the TV and gets up with a sigh "Yeah, I suppose. I should probably look for Tim a little more before going to bed." She started looking underneath things, trying to locate her wayward husband.
Monica is glad Sarah wasn't looking at her as she struggled to not break out laughing, "That's okay. I'm sure he'll turn up eventually," she blurted out as kindly as she could before fleeing the house. As soon as she shut front door behind her, she popped her already sweaty heel out of the shoe and said down to Tim, "Oh dear, I forgot I walked over. I guess It's a good opportunity to break in my new shoes, don't you?... Unless you don't want me to of course." Tim again quaked with fear, vibrating against her sole, "Glad you agree. I love a team player," and with that, she took off in a jog back to her house.
As she finally came to a stop inside her house, Tim was in hell. He could feel his body faintly beginning to distort from the repeated heel impacts and the toes digging into him. Even worse, her disgusting foot sweat had soaked directly into him the whole run, becoming part of him. Finally he felt her cheesy feet leaving the shoes. Tim started gasping for fresh air, and was horrified to realize he was already starting to reek like her feet. "Oh god," he thought to himself "I've got to get out of here before this gets any worse!" Too bad he didn't even know what triggered the change.
Monica let both shoes rest in front of her as she sat on the couch watching TV. After a bit she put her toes back into the mouth of the shoe, letting them press down into her former brother-in-law. "It's so of you to finally make yourself useful Tim. Maybe I'll give you a spray of perfume every few months as a way to say thanks," she said with an evil grin as she started to scrunch her toes over and over on top of him.
While watching the TV, Monica thinks variations to herself of, "He can just stay my insole forever," and "He'll be so much more useful if this is as permanent as I hope it is." However after a while, she got bored of the show that was on. She looked around a bit, not wanting to get up, then with an annoyed sigh, thinks to herself, "Actually, I kinda wish he was the remote control. Then he'd be helpful"
Unknown to her, Tim felt a tingle run through him at her unspoken wish, almost the same as before he'd changed into this wretched form. But is he becoming the remote, or were all her previous desires to have him stay this way too much?