In the morning inside of the large mansion with Rico waking up, getting ready for his day until he heard the doorbell ringing. He goes downstairs to the front door, opening the double doors to see it was Gwen Tennyson smiling at him. She scoops him up in her arms, giving him a big kiss on his cheek due to her being extremely happy to see him again.

Rico: Mommy Gwen! You're back again after it's been a while since you were a blueberry~.

Gwen: it really has, Rico. I'm very happy to see you again. I'm thinking about a lot of fun we can do together~.

Rico: oh nice. I set up a helium tank for you to try out. I want you all big and puffy for me~.

Gwen: *smirks* that actually sounds really fun, baby. Let's go do it~.

She takes him to the living room where they see the helium tank in the middle of the room with the hose connected on the nozzle. Rico hangs on tight on hwe back, getting excited to see her become very big and puffy for today. Gwen smirks more, looking at him over her shoulder before she puts the hose in her mouth.

Gwen: are you ready for this, baby~?

Rico: yes, Mommy. I'm ready for you to start floating and being my blimpy best friend again~.

Gwen: hehe, good. I'm going to start inflating myself right now for you. Hang on tight, okay~.

Rico: I would love you to be so big and floaty. Get as big as you can for me~.

Gwen chuckles from his playful behavior, putting the hose in her mouth, turning on the helium tank as it starts to puff her cheeks up, expanding her belly slowly with her shirt stretching out along with her butt and thighs expanding, stretching out her pants to make her butt crack exposed. Rico laugh to see the sight of his best expanding more bigger, floating off the ground with her arms and legs expanding, raising upwards and her breasts fully expanded. Gwen moans softly, spitting the hose out of her mouth, and finally becoming a big, blimpy girl.

Rico: now you're a big blimp, Mommy Gwen. It's been a while seeing you inflated~.

Gwen: *muffled* thank you, baby. I really love being your personal blimp. It feels so good~.

Rico: hehe. That's nice. You look really good as a big blimp when inflated all the time~.

Gwen: *muffled* aww, thank you, sweetie. I'm glad to be inflated for you~.

Rico gets on top of her, bouncing on her Inflated body like a trampoline, laughing to have fun with his ballooned Mommy. Gwen giggles, enjoying the sensation of Rico bouncing on her which turns her on. Rico hugs her inflated butt, making her moan softly as he would pull her pants down, putting his small penis in between her large cheeks, thrusting her slowly while smacking her gently to make it bounce and wobble.

Rico: doing this with you is so fun, Mommy~.

Gwen: *muffled moans* oh yes it really does, baby. I really loving this so much~!

Rico: me too. Hehe. I'm going to keep going for you so we can have more fun~.

Gwen: *muffled* good, baby. Fill this blimpy Mommy up~.

Rico continues to thrust in her more, feeling her inflated butt bouncing on him, picking up the pace to keep going while hugging her large butt cheeks. Gwen was panting, rolling her eyes up to feeling him going more faster, feeling herself getting more close to her climax while he was precumming inside of her wet entrance.

Gwen: *muffled* you really turn me on, Rico. I don't think I'm going to last long~.

Rico: *panting* yes, Mommy. Let me fill you up until I release my love for you. I'm close to letting it all out~.

Gwen: *muffled* I would love to feel it all. Fill me up, baby~!

Rico: oh yes... so amazing to give you my love~...

He thrust a few more times until he fills her up with his hot seed, moaning softly while Gwen squirt out all of her fluids on him, moaning lustfully. They both were panting as Rico takes out his member from her butt, cuddling on her back, and giving her a big kiss while rubbing her large boobs, squishing them gently to make it squeak. Gwen moans softly into the kiss, feeling his small hands groping her breasts that made her nipples erect through her shirt.

Gwen: *muffled* I never felt this good for a long time, baby. You did very well~.

Rico: thank you, Mommy Gwen. I really had fun with you like this. Let's have more fun~.

Gwen: *muffled giggles* I'm up for more. Now, cuddle on your blimpy Mommy, my best friend ever~.

Rico: yes, Mommy. Let's float around the mansion like you're a big space ship~.

He hang onto her back as they float through the hallway, bouncing gently against the wall with laughter filling up the silence. Rico cuddles her from behind, kissing her cheek while Gwen smirks at him, enjoying her time as his personal big, blimpy Mommy and best friend.