Sarah was out shopping, her best friend Cass was coming over to see her and they hadn't seen one another for a couple of months. Sarah was desperate to impress.
She had been in a few shops but hadn't been able to find anything that she felt was sexy enough, walking through the city she found herself looking in the window of a small boutique. The dresses on display where just the thing she had in mind, a little bit more expensive than she would have liked but Cass was worth it.
She entered the shop, there were one or two other people browsing the racks of clothes, some being helped by the assistants. She herself looked over the dresses and selected two she liked the look of; one was a short flowery summer dress; another a tight black dress, split right down the back.
She asked a pretty assistant if she could try the dresses on and was shown over to the corner of the shop, where hidden behind a curtain were two changing rooms, opposite one another.
"My names Jenny, I'll stay here, and if you need any help just let me know" the pretty assistant said.
Sarah entered the cubicle, and hung up the dresses on the peg. She removed her T-Shirt and slipped out of her skirt. She admired herself in the full length mirror. She selected the first dress, the summer dress; she slipped it over her head adjusted the straps and looked at herself in the mirror. The strong light from behind her shone through the thin material, her long slender legs silhouetted through the material. She liked the dress, it looked sexy, she felt sexy, she imagined going for a walk, with Cass, wearing this dress the sunlight shining through the material, Cass admiring her body, a hand sliding up the dress onto her thighs.
Sarah closed her eyes at the thought and involuntarily she ran a hand up under the dress onto her thighs, her fingers scratching along her thigh. She ran her fingers along her pussy, over her panties, her other hand started to massage her breasts though the dress. She opened her eyes and watched herself in the mirror touching herself, the hem of the dress raised, she watched herself touching her pussy. Out of the corner of her eye she noticed the curtain to the dressing room wasn't closed fully; and in the other changing room she could see Jenny, the assistant, sitting on the bench. She was leaning back against the wall her, a hand pushed in the waistband of her skirt, she could see Jenny's hand working vigorously on her mound.
Sarah was shocked, embarrassed, and also turned on, this other woman was getting off watching her masturbate. Without thinking she called out to Jenny, asking for some assistance. She watched in the mirror as Jenny quickly removed her hand from her skirt, wiped her fingers clean, adjusted her clothes and left the other changing room.
"Can I help you?" Jenny asked stepping into the changing room.
"I'm, not sure which dress I should buy, I want something sexy to turn my friend on" adding "I haven't seen her for a month or so"
"Why don't I see you in the other dress?" Jenny asked.