Outside in the backyard at night by the large mansion/chocolate factory with Rico Nepolio camping outside, roasting some marshmallows to make s'mores. He saw a female alien that have large, dark eyes, prominent antennae on her forehead, and dark hair with green streaks, often wearing bug-like, earthy-toned outfit.

Rico: Cool. It's an alien.

Mantis: hi. I'm Mantis. I'm from the Ego's planet where I was raised there. It's nice to meet you, human.

Rico: it's nice to meet you too, Mantis. My name is Rico Nepolio. I was camping in the backyard, but I would love to show you inside of my home. It's a chocolate factory inside.

Mantis: oooh! Chocolate factory. I wanna go see inside of your home.

They get up from the campfire, pouring water on it to put it out, and walk back inside of the large mansion to tour around. Mantis' eyes widen with excitement to see how colorful and really amazing his home was in the inside. Rico gives her a gummy in her hand, watching her put it in her mouth to swallow it down her throat.

Mantis: mmmm, so yummy. What kind of food is this, Rico?

Rico: it's a gummy, Mommy Mantis. They're really good and popular when I sell them. They also going to puff you up.

Mantis: puff me up? I would love to be puffed up from the gummy~.

Rico: that's sweet. It looks like your belly is swelling up already~.

She feels her belly expanding as she looks down at her body swelling up, looking back at Rico with confusion and excitement. Mantis' dress begins to strain as her butt and thighs expanding along with her arms swelling up, raised to the sides and her legs puffing up like inflatable tubes. Rico watches her body inflating as she giggles uncontrollably to see her breasts expanding like two large balloons and her body stopped Inflating as she's now a semi inflated balloon woman.

Mantis: cool! I'm full of air now! Like a balloon, baby~.

Rico: I know right, Mommy Mantis? You're a semi inflated Mommy. You look really cute like this~.

Mantis: aww, thank you Rico. I wanna cuddle you in my arms so much~.

Rico: go ahead Mommy. Cuddle me as much as you like~.

Mantis' inflated arms wrap around Rico's small frame, her fingers pressing gently into his back as she lifts him effortlessly against her pillowy chest while she waddle out of the kitchen with her inflated body bouncing and wobbling a lot down the hallway. As they made it to the living room, Mantis bend down by the couch, giving Rico her inflated butt cheeks as she feels him pulling her leggings down, getting her exposed, and his small member gently thrusting inside of her that made her gasp in pleasure.

Rico: your butt is really big, Mommy Mantis. It's really squishy like a big balloon~.

Mantis: *moans softly* oh, baby. This really feels so good. What are you doing behind my big butt~?

Rico: I'm having a lot of fun with you from behind. It's really good when I do this to you~.

Mantis: whatever you're doing, keep it up for me. I'm really excited about this~.

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. Mantis' moans grew louder, having her tongue sticking out, panting due to her inflated body being so sensitive, getting close to her climax that's going to erupt like a volcano at any moment.

Mantis: oh yes, Rico. I don't think I can hold it much longer... I feel like I'm going to leak~.

Rico: yes, Mommy Mantis. I would love to taste your juice a lot and your big boobies after I release all of my love~.

Mantis: let it all out for me, baby. Mommy need your love in her womb now~.

Rico: *moans softly* it's going to come out, Mommy... 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. Mantis panting from their taboo, hugging him tightly in a warm embrace, patting his head gently as she continues to nurse him.

Mantis: you did very good, baby. Mommy will feed you milk~.

Rico: mmmm, thank you, Mommy Mantis. That was amazing of us doing this together. You're a really cool balloon Mommy~.

Mantis: *chuckles* I'm glad to be your big balloon Mommy for today, sweety. I really love this moment so much that I want to stay on earth with you. Now, relax on top of me and continue drinking Mommy's milk~.

Rico: that's really sweet. I'm happy to have you as my friend, 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. Mantis panting more, getting turned on to feel him sucking on her more, rubbing his back as she loves her role of being his big, balloon Mommy for the night while thinking about how earth is a really interesting planet to call home.