My perfect Fat boy

Fatten up my piggy

I awoke from someone opening my door, oh it was Britney. She carried a tray packed with food and a milk shake. I ate, there was still half the tray left when I got full. And I only just realised Britney was still standing in the room. She was my step sister and I had always had a secret crush on her. We shared a house that are parents payed for, they thought it good bonding time and we had lived together for four years now. We had grow very close. Her figure was amazing thick juicy thighs and big bouncy boobs. She was the hottest most perfect woman. I had worked out for years wanting her to fall for me. I had got myself a chiselled six pack for her and everything.

She walked over to me and grabbed some food off the tray shovelling it in my mouth saying.
"You wouldn't want my food to go to waste."
I watched in pleasure as her boobs jiggled.

I looked down and my face went red. My belly was bloated out stretching my shirt. I couldn't say anything because she was shovelling cake after cake meatloaf after meatloaf. Suddenly she stopped and I realised the food was all gone. I burped as she patted my belly and jiggled it a little.

After about an hour I awoke. I looked down and my eyes widened. I was naked and there were hand marks all over my belly which wasn't so bloated and stretch. My thighs were now massive, chunky and flabby full of fat. My new man boobs laying on my belly shamefully.

First I put on some clothes a green button down and a pair of jeans which were the biggest I had. Next I went down stairs and was amazed to smell food. Going into the kitchen I was greeted by Britney who sat me down at the dining room table. In front of me there was a single burger.
"You gonna just sit there or you gonna eat."
I picked it up and ate. Devouring it in four bites. And I quickly fell fast asleep.

I awoke tied to the chair a tube in my mouth. I looked up and saw Britney standing over me holding a milkshake.
"Mummy's got something for you drink up."
She said pouring the milkshake into the tube. Mummy what? I was confused for a second. Then I started squirming as thick warm milkshake filled my mouth. I didn't swallow and soon my full mouth started to overflow filling the tubes tunnel way.
"How dare you disobey mummy."
Slapping me across the face then holding my nose. Soon enough I couldn't hold my breath anymore and I swallowed. Immediately my belly started to bloat.

I had been so focused on Britney I hadn't noticed there were 12 other milkshakes sitting on the table.
"Oh my did you only just realise, don't worry mummy will plump you up to be a good piggy."
She said patting my bloating belly with a evil smile. I didn't understand why she kept saying mummy, like I knew she was older than me but only by 6 years which wasn't that much. Suddenly the milkshake stopped, I looked down at my belly in horror it was massive, stretching out my shirt buttons to there limit.

Britney picked up the next milkshake and I would have gaped if my mouth wasn't strapped closed. Britney had changed into a small bikini which barely covered her. Her massive boobs jiggled side to side with every movement she made.
"Do you like it piggy, mummy picked it specially for you."
She said grabbing her boobs and shoving them in my face. My face went red as I felt my cock elongate and harden. Britney only laughed looking down at the bulge in my pants.
"Good mummy loves to know you like it."
Next Britney removed the tube but before I could scream a gag was put over me.

Britney then started pushing down on my belly. I only just realised what was happening as it was to late. And the loudest, longest fart I had ever done came out of my ass. My face turned bright red like a tomato Britney just giggled doing it again. I let out another fart then another and another and another. I kept farting every time she pushed down. I moaned in pleasure as I felt the pressure in my belly ease.
"Good piggy now continue to fatten up for me."
She removed my gag and shoves the tube back into my mouth.

My cheeks were bright red and I stayed hard as I watched her boobs jiggle. She grabbed more milkshake to fatten me with.
"Ok I'll fill you with this and one more then your done till tea where you will finish the leftovers."
My shirt felt really tight. Like fat was leaking out of the holes in between the buttons. During the rest of the milkshake my eyes never strayed from Britney's sexy curves that were in all the right places. Oh my shirt buttons began to squeeze my belly digging into my bellybutton. I moaned in pure pleasure and delight as one by one my buttons popped. Letting my massive belly flop out resting on my lap. Britney slapped it whispering.
"Mummy's perfect piggy."
And I was flustered when she started kissing my belly and rubbing it.

I felt a overwhelming urge to please her so I started moaning. My jeans started getting tight and I knew they would rip soon. Ping the button on my jeans pinned off and hit the fridge leaving a massive dent. Next my zipper unzipped by it's self  letting the little flab of fat stored there to ooze out. Finally the milkshake stopped and the tube was removed. This time no gag was put in. But I didn't call for help.
"I see piggy is starting to like his fat belly, don't worry your fat little belly about anything mummy has got you."
Although it was weird the hole mummy thing it was kinda turning me on and I could feel the bulge coming back.

Britney picked up the tube again and before I could think the tube was shoved in my mouth again and I was being pumped full of milkshake again. Britney tied the tube to a hook on the ceiling and lent the milkshake on the string to keep pouring in. Then she sat on the end on my knees and lay on my belly her head resting on my shoulder. I could feel her squeeze into my fat her hands hung around my neck. My dick bugled up again as her boobs jiggle on my belly each time I breathed and her fat ass consumed my leg in its crack. Wait her leg was on my cock she could feel my boner. Before I could think on that anymore my jeans ripped open letting my thick juicy thighs filled the chair and my ass flop out of the sides of the arm rests. My cock now lay on Britney's leg. The milkshake stopped and She got off me. Pushing my cock off her leg with a smile.

She removed the tube and I just sat there fat naked and horny. I was surprised as Britney pulled up close to me and forced her lips on mine. She wiggled her tongue in the my mouth and went hardcore. But as she bounced up and down on my belly from kissing my stomach gases up again and I farted.
"What a cow you are."
she said slapping my belly. It was true, I was a obese naked cow, helpless and fat.