Becky started working for a high street sports shop about three months ago. Her birthday was tomorrow and she was working it. She wasn't happy about it, but she had bills to pay. There were rumours about a first birthday special at work initiation, but she didn't know what to expect. There had been no birthdays during her time there, so she had yet to experience it.

It was Monday, a quiet day of the week, and it started like any other day. Screaming brats who didn't want new trainers and smelly old men bringing theirs back claiming they were broken!

Becky wore her uncomfortable 'uniform' of shorts and t-shirt - both of which were too small. It struggled to keep her large boobs and curvy bum in place and she was sick of teenagers and men alike ogling at her and trying to pinch her bum. Perhaps her manager would allow her to have a new uniform that would fit. When Becky started, she was told by her manager that it would have to do and she had nothing else from HQ.

At lunchtime, her manager Mandy called her to the office. Becky knocked on Mandy's door. "Come in" came the voice from inside. Becky entered and shut the door.

Mandy looked Becky up and down and handed her an Elsa costume.

"It's your birthday tomorrow, and you should look like a princess." said Mandy.

Becky looked at the costume. "It's too small" she said.

"Look", said Mandy. "I know it is small, but we have hundreds of these to shift in the sale and you would be doing me a favour. In return I can look at your uniform for you from HQ and perhaps give you tomorrow off".

"Mm, ok" said Becky and off she went to get changed.

After getting changed, she looked at herself in the mirror. The only bit that fit was the wig which covered her long brown hair. Her boobs strained against the fabric, and when she crouched down she could see her lacy blue panties up the slit at the side. "It's only for an hour" she told herself.

She straightened up and heard some of the stitching pop. Damn. She looked herself over, and couldn't see anything coming apart.

Becky sighed and stepped out onto the shop floor. She felt all eyes on her. A boy in mid teens dropped his skateboard, Jade gave her a 'fuck me now' look and poor Sam, the shy lad on the team didn't know what to do with himself.

Well, thought Becky at least I have made an impression. For the next hour she stood at the promo stand feeling humiliated trying to flog the costumes, but there were no taker's. Perhaps she will quit tomorrow.

At closing time, Mandy's voice came over the PA, "Becky to the warehouse please". Becky made her way to the warehouse and went through the doors. It was dark.

"Hello?" she called. There was no answer, but two hands grabbed her arms from behind and steered her into the darkness. She shrieked in protest. The lights came on and more hands taped her arms to a column.

Mandy stood in front of her. She grinned.

"Happy Birthday" Mandy said.

The team stood behind Mandy, even shy Sam.

"What? Why?" shouted Becky.

"It's your birthday tomorrow and we give our team a birthday surprise" said Mandy.

"Let me go" said Becky.

"When you have had your treat" said Mandy. "George, take it away"

There was a clank from above Becky. She looked up and saw George with a bucket. He tipped the bucket and a thick yellow liquid started to fall.

Splat, splat went droplets on Becky's wig. Then it became a torrent, oozing all over Becky. The Elsa costume had no chance, it filled with the liquid which tasted like custard. The strap over her left shoulder popped and the dress started to fall off on that side exposing her baby blue bra.

Becky tried to free herself, but was stuck fast. "Stop" she shouted, but the custard kept on coming. After several buckets, the custard stopped. It was quiet in the warehouse, there was the dripping of the custard. Suddenly the other strap failed on the dress and it slid to the floor. Becky was stood there, her curves on show wearing only her baby blue lacy knickers, bra and Elsa wig.

Mandy walked over, and remove the wig. "George, the last bucket please". Splat when more custard covering what was clean hair.

"Now the cakes and pies." said Mandy.

Becky noticed a table covered in pies and cakes.

Mandy walked over to the table, trainers squeaking on the floor and picked up a pie. She turned and grinned at Becky. And threw the pie at Becky's face. Splat it went.

The paper plate dropped to the floor. Cream dripped from Becky's face.

Then the assult began for what seemed forever. Cakes and pies were thrown by everyone there. Becky screwed her eyes shut. Finally it ended.

Becky stood and blinked the cream, cake and pastry from her eyes.

Everyone was looking at her. Becky felt uncomfortable. At least she was covered.

"Lets get you cleaned up" said Mandy.

Again, there was a noise above her head and cold water dropped onto her, washing the crud from her body. Several more dropped on her head and body finally she was clean. She shivered.

Everyone in the room sang happy birthday. Mandy walked over, cut her free and handed her a fluffy towel.

"You can have tomorrow off, paid" Mandy said, "and I will look at your uniform. Go get showered".

Becky headed to the showers and found some nice hair products and shower gel with a bow on it and a tag with M written on it. At least Mandy is looking after me I suppose she thought.

She showered and dried herself, put on her uniform (less the underwear which is now in the bin) and her coat and headed home.