'No wait!' said Nancy. 'Why should Chris be the guinea pig. I think you should demonstrate it yourself' she addressed Tanya.
Chris stopped as he was. He held the medallion in one hand and had picked up the bra with the other.
'I'll take that' said Nancy as she reached over and took the medallion out of Chris's hand. 'Ouch' as she felt a zap. She brushed that aside thinking it was just static electricity. 'Here' she said to Tanya. 'You demonstrate this is safe before making Chris take the risk'
Tanya was the only one of them who knew that the zap Nancy had felt was an indication that the medallion actually worked. She smiled when Nancy challenged her. 'Sure but if you want proof that it works have a look in the mirror. When you took the medallion off Chris I'm pretty sure you activated it. If what I read is true then you feel a zap like static electricity if the medallion is going to work. Did you feel a zap as well Chris when Nancy took the medallion off you?'
'Um yeah' Chris replied. He had felt a zap.
'Well the next few minutes will be very interesting'
'But I never touched the medallion to the bra'
'You won't be changing into Mary but you will be changing sexes. Like I say look in the mirror'
'Chris look at your hair! It's growing' exclaimed Nancy
Chris hurried across so he could see his reflection in Tanya's mirror. He immediately recognised the change in his hair. 'Oh God what's happening. My hair is turning brown'
Tanya now addressed Nancy 'I recommend you take out your earrings and unless you want it ripped take off your dress'
'What? No way! Not in front of Chris!'
'You and Chris won't have secrets anymore. Don't you recognise the hairdo he is developing?'
'What's going on? That looks like my hair'
'Yep and if you look at yourself you are turning blonde and your hair is getting shorter. You really should take out those earrings'
'What is happening?' said Chris. Did his voice sound higher?
'It's obvious to me' said Tanya. 'You two are doing a body swap'
It had been 5 minutes since the zap and Chris and Nancy were still staring at their reflections. 'I'm shrinking' said Chris. His voice was certainly an octave higher. 'And my eyes are turning brown'
'And I'm getting taller and my arms are growing hairs' Nancy was finally believing Tanya. She scrambled to remove the dangly earrings she was wearing. 'My dress is feeling tight'
'I warned you. You are changing into Chris. You will burst your buttons'
'I'm shrinking!' His voice sounded quite girly now. He now had long brown hair and his face had softened. There was no doubt he was changing into Nancy. The two were now the same height.
Nancy undid the buttons on her dress and recognising Chris would soon need to wear it took it off. She also took off her sandals. They were feeling tight on her feet. She kept her bra and panties on though.
Seeing what Nancy was doing Chris pulled off his shirt. He was curious to see if he was growing breasts. He was. His chest looked puffy and his nipples were enlarged. Soon he pulled off his jeans. They were feeling tight around his expanding hips.
'Wow!' Chris said as he saw his now feminine looking legs. He now sounded like a teenage girl. He placed his still masculine hands on his crotch and was temporarily relieved to feel he still had a bulge. However his relief was short lived as minute later he felt his crotch retracting.
Nancy looked across at the feminised Chris and saw she was now taller than him. She also saw the budding A cups he now sported. He looked more female than male.
Her own breasts had diminished and her bra was feeling tight. She whipped it off. Her torso was developing a triangle shape - she was developing Chris's broad shoulders. She passed the light blue bra to Chris and said 'I guess you will be needing this very soon' Her voice was noticeably deeper. She noticed her arms were also now male and she had Chris's hands and fingers.
The changes had been happening for over 20 minutes now and both Chris and Nancy were holding their crotches as she grew a set and he lost his crown jewels. By now Chris had B cup breasts and Tanya helped him put on the bra Nancy had recently taken off.
Much to Nancy's embarrassment her new penis was standing to attention. At first it just pushed her or should we say "his" panties out but it continued to grow and could soon no longer be contained by Nancy's silky light blue panties. Nancy picked up his discarded dress and held it to the front of his crotch. He looked in the mirror and essentially saw Chis looking back. It seemed her mouth was the last bit of herself to disappear. Her teeth now felt different as well.
Chris looked at the girl in the mirror. It was Nancy's face looking back at her. Chris knew she was now female. She had a completely flat crotch. There was no longer anything between her thighs. She too had noticed how her teeth had changed. Her mouth felt so different. She smiled at the girl in the mirror. She now had Nancy's white teeth that her parents had spent thousands of dollars on. She looked across and up to Nancy. She was now 3 or four inches shorter than him.
'Well I think you two need to get dressed. I'll bet you now believe the medallion works'
'I'll admit it works' said Nancy. She sounded so different. 'You have proven it beyond doubt. Now you had better change us back. I promised Mum I would be home by 10.30'
Chris was feeling her bra clad breasts. She now filled out the bra perfectly. 'These seem huge' she said. 'What size are they?'
'32 B' Nancy replied 'How big are you? This won't go down' she indicated her crotch she was still covering with the dress.
'Big enough' said Chris. She had been proud of the penis she used to possess
'I'll say' replied Nancy 'I guess we just hold the medallion at the same time once more and we change back?' he looked at Tanya
Tanya blushed 'Um not exactly. If the internet is correct you wont be able to change back for 12 hours. But it's worth a try'
'What!' Shrieked Chris. Do you mean I'm stuck like this until morning'
Nancy had snatched up the medallion and touched it to Chris 'No zap this time' he glared at Tanya
'I'm sorry. You weren't meant to change. I was only going to change Chris into Mary then keep her hidden for a day'
'How am I going to go home looking like this?' Nancy gestured to himself.
'You will just have to pretend you are each other for the night. Chris can go back to your house then return in the morning. You spend the night in Chris's room'