Sequel to this story:
https://www.furaffinity.net/view/63675273

shows Hurbert walking over to a warehouse where Vincent was at, now that he lost weight and gotten his normal body figure back)

Hurbert: Oh, hey, Vinnie.

Vincent: Hey Hurb. Good to see you again. As you can see, I have gained my slim body back.  Glad you came here on time big guy.

Hurbert: That's good to know, for both parts.

Vincent: Anyways, I have something for you.

Hurbert: What is it?

Vincent: (shows Hurbert a blue stick of gum) This.

Hurbert was confused by this.

Hurbert: That's it? Gum?

Vincent: Yes, but it's very special, it's blueberry flavor and the gum doesn't run out of it's sweetness. Would you like to try and chew on it? It's very good Hurb.

Hurbert: Sure, that sounds great, Vinnie!

So Hurbert took the gum and tossed it into his mouth and starts to chew on the gum. Vincent's revenge plan was going flawlessly.

Vincent: (thinking to himself) Oh yes, that's right, chew on that gum big boy, you'll soon get to be and even bigger boy and a blue boy at that too.

Hurbert: (chewing) Mm, this gum is so sweet and fruity.

Then Hurbert tasted the blueberry juice from the gum. He was enjoying it very much.

Vincent: So Hurb, how's the gum I gave you?

Hurbert: (chewing) It's so good!

Hurbert then swallowed the gum because he felt like it.

Vincent: Did you just swallow the gum? Why is did you swallow the gum?

Hurbert: I just felt like it.

Vincent: Okay.

Just then Hurbert's nose turned blue and Vincent began to chuckle.

Vincent: (chuckles)

Hurbert: What's so funny, Vincent?

Vincent: Oh nothing Hurb. However, you're looking a little "blue" today. He he he.

Hurbert was confused by this.

Hurbert: What do you mean, Vinnie?

Vincent pulls out a mirror and shows what he is talking about to Hurbert.

Vincent: See for yourself Hurb.

When Hurbert saw his nose turning blue, he was shocked.

Hurbert: (gasp) You're right! My nose IS turning blue!

Then Hurbert saw that his hands where turning blue as well. He was confused.

Hurbert: What's going on?! Now my hands are turning blue too!

Hurbert then saw his whole body was blue and his clothes were stained and turned a deeper shade of blue. Hurbert was starting to get even more confused on what was happening to him.

Hurbert: I'm so confused! Why am I turning blue?!

Hurbert then felt his belly gurgle.

Hurbert: Oof.. My belly feels funny.. And it feels like my clothes are getting tighter..

Then Hurbert felt his belly swelling up. He was shocked at what he is seeing right now.

Hurbert: Gah! My belly is getting even bigger!

Then Hurbert felt his butt swelling up as well and nearly lost his balance because of it.

Hurbert: My butt is getting bigger too!

Hurbert then heard his tracksuit pants ripping, exposing his white underpants with red hearts. He felt embarrassed about this.

Hurbert: Oh no, there go my tracksuit pants!

Hurbert began to grow bigger and rounder. He then felt his cheeks puff up with blueberry juice.

Hurbert: Mmph! My cheeks!

Hurbert then felt his limbs sinking into his swelling body. Along with his head, but it wasn't sinking in all the way like his limbs.

Hurbert: This doesn't seem right..!

Some minutes later... Hurbert was now round completely and he was immobile. He felt embarrassed by this.

Hurbert: Oh man.. I feel like I'm going to pop...!

He then saw Vincent laughing.

Vincent: (laughing at Hurbert)

Hurbert: Vinnie? What's so funny?!

Vincent: Well, remember when you made me gain weight at your bakery?

Hurbert: Yeah. You got so big your pants ripped.

Vincent: Well, consider you being turned into a blueberry polar bear as payback.

Hurbert: Oh man..!

Vincent: Yup. Now we're even Hurb.

Hurbert: Hmm, I guess so.

Vincent: Don't worry, the effects will only last for about 30 minutes and you'll be back to normal again.

Hurbert was glad to hear this.

Hurbert: Yeah? That's good to know.

Vincent: In the meantime. (walks around Hurbert and sees his tracksuit pants ripped) Wow, you're pants really have torn. Looks like they weren't made for people of your size. HA!

Hurbert: Really? (blushes)

Vincent: Yup. Plus, I've always wanted to do this. (starts pushing Hurbert by his butt and starts to push him around, making Hurbert dizzy)

Hurbert: Whoa!!

Vincent: Pushing you in this state is so much funny. LOL

30 minutes later...

Hurbert: I feel so dizzy after that..

Vincent: Well at least it's over. Just in time too.

Hurbert: You mean..?

Vincent: The effects of the gum will start to wear off now.

When Hurbert returned to normal...

Hurbert: Phew, back to normal now.

Vincent: Yup. You really were fun to push around and I mean it literally. By the way look behind you big boy.

Hurbert: Huh? What is it?

Vincent: You know what is it. You're tracksuit pants ripped and your underpants are exposed.

Hurbert: Gah!

Vincent: Yup. Like I said, we're even. You can use your tracksuit jacket to cover it up by tying the sleeves around your waist.

Hurbert: Yeah, you're right. And good idea too.

Vincent: Maybe you'll think twice before messing with this sly fox Hurb.

Hurbert: Yep, hard to outsmart a fox like you, heheh.

The End