On a good afternoon in the city where Rico was shopping at the store for some gummies, he get out to see someone that's swinging high up by the buildings, landing in front of him with a heroic pose. The person was a superhero named Spider-Gwen that smile at him through her mask, and gently pat his head, bending to his level eye to eye.

# hey there, kid. What brings you here to shop all alone? Do you need any help?

Rico: sure, Ma'am. I would like you to help me with some groceries. My name is Rico Nepolio. What's your name?

# your friendly neighborhood Spider-Gwen! It's nice to meet someone so small and adorable like you. Hold on tight on my back. It's going to be a fun ride.

Rico: hehe. Sure, Spider-Gwen. I would love a ride.

He hops on her back, giving her his groceries as she shoots her web out of her wrist, and start swinging really high and fast, but still make sure he's safe and holding onto her tightly. As they made it to the mansion, Rico grabs a gummy from the table, and gives it to her as a reward for helping him with his groceries.

Rico: here's a gummy for you to munch on, Spider-Gwen. I thank you so much for taking me back home with my groceries.

# thank you, Rico. I never really ate gummies much, but I'll take it.

Rico: you're welcome. Can I see what you truly look like please?

# *nods* sure thing, pal. But you gotta keep it a secret, okay?

Rico: don't worry, Mommy. I won't tell nobody.

Gwen smiles warmly, taking her mask off to reveal her face at him, telling him her real name is "Gwen Stacy" putting the gummy in her mouth, and swallow it. After consuming it, her belly swells up with air, stretching out her bodysuit and her butt and thighs expanding, surprising her. Rico giggles to watch his favorite superhero inflating like a balloon with her arms and legs wide, spreading like a starfish, and her breasts gets bigger. Gwen's body stopped Inflating, becoming an inflated sumo mommy for him to play with.

Gwen: oh man. That was... something, Rico. I feel really full and light~.

Rico: pretty cool right, Mommy Gwen? You're a big inflatable sumo mommy for me to play with. You look really good like this.

Gwen: aww, thank you, baby. This isn't so bad. How about you would like a piggyback ride on this inflatable spider~? *Wink*

Rico: sure. I'll give you a lot more fun for us to do~.

He crawl up on her big butt, then cling onto her back as she waddle out of the kitchen through the hallway awkwardly, which made her giggle to feel her inflated body wobbling each step she takes. Now at the living room, Gwen bend down a bit on the couch with her big butt up in the air as Rico takes off her suit off, getting her completely naked, putting his small member between her large ballooned cheeks, and penetrate her gently that made her gasp.

Rico: you're really warm and tight, Mommy Gwen. Your butt is really big and squishy for me to do this with you~.

Gwen: *panting* my big booty is all for you to have, baby. Fill this spider up with your webs~.

Rico: *chuckles* yes, Mommy. Anything for this puffy superhero~.

Gwen: good, sweetie~.

Rico continues to pound her more, feeling her large butt bouncing on his body, squishing him against the couch as he reaches to play with her inflated breasts, teasing her perky nipples that's getting hard, leaking milk on the palm of his hands. Gwen's moans grew louder, having her tongue sticking out, panting due to her inflated body being so sensitive, getting close to her climax as she twerks on his lap to get him to fill her up.

Gwen: *moans lustfully* are you getting there, baby? I can tell you're going to let it all out~.

Rico: oh yes, Mommy. I'm not going to last with you shaking your big butt on my lap. Keep it up for me please~.

Gwen: you're doing a good job on this. Release all of your spider webs inside of me~.

Rico: *panting* ok... here it comes~!

He thrust in her a lot more faster, teasing her inflated clit that made her eyes roll back in her head, seeing her now squirting all over him as he finally release his seed, filling her up completely. Rico taste her juice, slowly getting out of her, and cuddles on top of her Inflated belly to suck on her nipple for her milk. Gwen panting from their taboo, hugging him tightly in a warm embrace, patting his head gently as she continues to nurse him.

Gwen: that was really something, baby. I really enjoyed this so much with you~.

Rico: thank you, Mommy Gwen. I'm glad you love it so much. Your milk also taste so creamy and sweet~.

Gwen: *smiles warmly* that's nice of you, Rico. I'm going to stay inflated for a while for you. I really love being a balloon a lot~.

Rico: *chuckles* that's cool you love it a lot. Let's continue to cuddle more, Mommy~.

He continues to suckle on her nipple, tasting her sweet and creamy milk while patting her inflated belly like a drum, and groping her other breast, switching to her other nipple to suck on it. Gwen panting more, getting turned on to feel him sucking on her more, rubbing his back as she loves her role of being his big, lovely balloon Mommy and now call herself "The inflatable Spider-Gwen".