More out of shock than anything, Steven concentrated...and reversed the head swap with his boss, who remained passed out on the floor. Instead of just leaving her like that, Steven dabbed some water on her head and helped her to come around. She thankfully didn't remember what had just happened, and Steven was grateful, he had tried going to far too quick and he knew it. "You'll be okay luv, go and have a sit down in your office" he told Elizabeth, who just nodded and rank some water.
Steven then made his way downstairs and onto the shop floor to start work. He happened to work in the evenings when the store was closed to customers, so there was just his co-workers to 'practise' his new powers on. But that was fine to him, since people noticed when he used his powers, he wouldn't want to go cause chaos. He'd need to swap subtle things that people wouldn't normally notice. Or tell someone of his powers and ask them if they want to 'trade' anything.
Naturally it was hard for Steven to concentrate, the knowledge of his new powers made him constantly excited, as the erection in his black trousers could testify. It wasn't long before he just had to use his powers again. He chose carefully.
Natalie was working on the toiletries section, filling a shelf with facial wipes, Steven looked at her backside, it wasn't as big as most women's, but definitely bigger than his was. "Oh why not!" he sighed, focusing on his friend's ass. "Ooh!" he then uttered as he felt his own backside expanding inside his trousers, just enough to make them tight-fitting. He stopped what he was doing and reached around to feel it. It didn't feel drastically different, but it was 'softer' and fuller.
Glancing back at Natalie, Steven watched as she finished stocking the shelf and stood up, pulling up her own, boot-cut, black trousers when they slipped down her waist a little. Steven realized that along with the butt...he had also acquired Natalie's curvier hips. He had to loosen his belt a little to compensate.
Natalie seemed just a little puzzled as to why her trousers now didn't fit properly anymore, but she didn't give too much thought to it, she just kept working and pulling them up whenever they slipped.
Steven smiled. "This'll do nicely!" he smirked, as he felt his new ass again.