As Maria Robotnik was shopping in an exotic shop of what Rico requested her to buy, she looks at the special fruit from the shelf that he mentioned about, buying it at the cashier, and walk her way to the mansion to meet him there. Finally make it to Rico's mansion, she gets inside, looking down at him, and gives him a big hug as she put the fruit down on the table.

Maria: long time no see, Rico. I'm happy to have my time with you. I also bought the fruit you told me about.

Rico: good job, Maria. This fruit has expanded Kyoko's butt before. She really loves it so much.

Maria: that's sweet to hear. Now it makes me want to try out the fruit. Would you like to see my butt inflate~?

Rico: *nods* of course I wanna see you have a bigger butt. Now, eat up the fruit and have a big butt~.

Maria: alright. Here's goes nothing~.

She grabs a knife, cutting the fruit in pieces, seeing it ooze out some fresh juice, grabbing a slice, and eats it up. Maria taste the refreshing liquid in her mouth, gulping down a few more slices until it was all done. Rico looks up at her with excitement, patting her butt a bit due to him can't wait for her butt to expand, hearing her giggling from him groping her backside.

Maria: *chuckles* you're so naughty, Rico. You're really excited for my butt to expand are you~?

Rico: of course I'm excited, Maria. It'll be a big, squishing cushion for me to play with all day without getting bored~.

Maria: good boy. I can feel something tingling. I think it's happening right now~.

Rico: nice, Maria. It's now expanding right now.

He pat her butt more, feeling it expand under his hand, seeing it inflating like two balloons along with her thighs expanding as well. Maria looks over her shoulder, smirking to see her butt getting bigger, lifting up her dress to show some of her panties under it, patting herself to feel how really squishy and bouncy it was from the fruit's effects. She giggles, loving her new form, playfully bumping her rump against Rico to tease him.

Rico: wow, it's really large, Maria. How do you feel~?

Maria: I feel very thicc. I'm totally loving my new large butt being all big and bouncing. Maybe I can squish you with it~. *Smirks*

Rico: oh, that sounds really fun to try out. I'm totally going to play with it all day~.

Maria: play with my big butt all you like, dear. I'm all yours~.

She gently gets closer to his body, squishing him with her ballooned butt, twerking against him while hearing his giggles that made her smile even more. Rico hugs her butt more, nuzzling against her from behind, making her cheeks bounce in front of him as he would climb on her back for a piggyback ride. He sits on her butt, feeling it wobble under him like a soft couch as Maria would walk through the hallway, outside of the mansion to give him a fun ride on her large backside.

Maria: I really thank you so much for advising me to eat this fruit, Rico. It makes me very happy to see you smile~.

Rico: and I really love your big butt so much. Plus, I'm enjoying this day riding on your back, Maria~.

Maria: good, baby. Now, enjoy your fun ride. I'm going to take you to the park~.

Rico: yes, ma'am. Onwards to the park~.

Maria giggles, continuing her way to the park, playfully bouncing her butt under him to make him bounce on it. Rico laughs, continuing to bounce on her backside more, enjoying his fun day with his thicc best friend that loves her fat butt that makes him really happy.