Mary arrived home before her mother. She felt wet just thinking about what she was hoping to do. She had been a a sexual high ever since she had placed that cap into her handbag. She had enticed a reluctant Grant into a lingerie store and baited him by holding some really racing looking items against her body. She loved how he blushed when she teased him and couldn't help checking out the growing bulge in his trousers. The thought that she might get to see that bulge first hand had pervaded her mind and was now all she could think about.
She was a virgin but not proud of the fact. Mom had given birth to herself and Mike when she was 19. Mary wanted to live life a bit more before she had children and was hence scared of the idea of having sex. When about a year ago she had asked Mom about the facts of life her reply had been 'Learn from my mistakes. Don't have sex until you have a ring on your finger' and that was the end of the conversation. She wasn't on the pill and indeed had not bought up the idea with Mom. She had thought about asking the nurse at her old school but never got around to it. Maybe once she started at the new school she might try again. In the meantime she saw the idea of being male for an evening as a safe way to get a sexual thrill without the risk of getting pregnant.
The cap had been put in her underwear drawer the second she was home. Mike wasn't home either. Mary snuck into his room and checked the contents of his wardrobe. She wondered whether any of Mike's clothes would fit her if she changed and was worried they wouldn't. Grant was a much bigger build than her scrawny brother.
Mike wandered back home at about 4. He had essentially done nothing all day. He hated Miami and had not made any friends in the two weeks they had been here. His only social interaction was online, chatting to some of his nerd mates from his old school. In hindsight, now that he was back in his own body, the weekend wasn't so bad. Mom was right. I had been an experience. He went straight to his room after noticing Mom's car wasn't in the drive, booted up his computer and began to masturbate once more to the picture of that girl.
Sharon arrived home shortly after Mike. After calling out to the kids and finding them both in their rooms, she put her new purchases in her wardrobe and checked to see that the medallion was still in the shoebox where she had hidden it. Even though Mike had found the medallion she had now appropriated it. After all wasn't she a responsible adult? Mike could not be trusted to look after such a valuable item. She checked the time. 4.35. That meant 2 hours and 24 minutes before she could use her new bra and enhance her figure. She couldn't wait. She went to the kitchen and began to think about what she could make for dinner.
Mary had been looking at her school biology book. She was checking out the pictures of a naked male. She liked the idea of a penis and the thought of being able to urinate while standing up but wasn't so thrilled about to prospect of having testicles. They looked so ugly. She had also heard that they hurt if they were squeezed at all. They seemed to be in a very inappropriate place. How do you sit without squeezing them?' When she heard her Mom come home she put the book down and went to the kitchen.
'Hi Mom, how was your day?'
'Really good. I'm hopeful about the job. The man I gave my resume to was very friendly and I couldn't help but notice he was checking me out. What did you get up to?'
'Oh I just met some friends at the mall and did a bit of window shopping'
'No cheerleading practice today?'
'Not until Thursday morning. Once school resumes it will be Tuesday and Thursday afternoons straight after school'
'I bought myself a new bra - with D cups. I'm going to try it out tonight with the medallion and see if I like the look'
Mary saw this as a chance to brooch the subject she had been thinking about all afternoon. 'Mom, this morning you mentioned I should consider maybe seeing what having a penis was like?'
That got Sharon's attention. 'Mm I did'
'Well I haven't been able to get the thought out of my mind all day'. I'm curious'
'That's one of many things we can try out. I'll admit I'm curious myself. Imagine being able to pee when you are standing and not making a mess'
'I think I'd like to try tonight. If I changed now I could become myself again in the morning'
'Mike was your twin. Perhaps you could become his?'
'I wasn't thinking Mike. He's a nerd. I'd rather be someone a bit more masculine'
'Oh?'
'I tricked Grant into wearing my hat'
'Grant? The footballer boyfriend?' Sharon had met Grant once when he had come to take Mary out on a date only last week. He seemed nice enough for a 17 year old. She could see Mary blushing 'Well he is better built than Mike I'll admit. But looks aren't everything'
'Could I.... Could I borrow the medallion?'
'I don't see why not. It was my suggestion that you try out being on the other side. I gather I need to make enough dinner for two teenage boys then?'
'Thanks Mom' said Mary still blushing
'Come with me. Would you mind if I watch you change?'
'I suppose not'
30 minutes later Mary was 6 inches taller and 50 pounds heavier 'I'm huge' he said in his deep voice.
'You sure are' agreed Sharon. The boy sure did have impressive dick. It was at least 6 and a half inches long and Mary seemed incapable of getting it to subside. The penis had been erect since it had popped out of Mary's groin. She had tried peeing standing up, with her mother watching eagerly. It was harder to aim than it looked. It was actually hard to make the penis point down at all.
'Could you get me something to wear? I don't want to go into Mike's room naked'
'I understand. I'll see what I can find. I suspect most of Mike's things will be too small for you'
Mike was oblivious to what had taken place in his mothers room. Since exhausting his semen he had been playing a computer game with his headphones on. He was surprised when his Mom came into his room and opened his wardrobe. They had come to an understanding that she stay out of his room. 'Hi Mom. What are you doing?'
'Requisitioning some of your clothes. We are having a guest for dinner'
Mike didn't understand. He went back to his game but kept an eye on Mom. She took some undies, his tracksuit pants and a too big T-shirt from his cupboard then left. Mike was curious about what she was up to but was too absorbed in his game to follow her out.
Mary had spent his minute alone gazing at his new private parts in her mother's mirror. The balls were ugly as he had expected but the penis was magnificent. He had not imagined it would be this big and could not imagine it fitting into his old vagina. Maybe Grant wasn't the perfect boyfriend after all?
He was happy to get the clothes off Mom and quickly put them on. It was just Mike's tracksuit pants and a t-shirt but she was feeling a bit uncomfortable about the way his Mom had been looking at him. The tracksuit immediately tented out. Mary had no idea as to how to get her erection under control.
Sharon suggested 'I guess we now know why Mike spends so much time in front of his porn' It was Sharon and Mary's little secret that they knew all about the magazine collection Mike kept under his mattress. 'You might have to ask his advice about this problem'
'Oh Mom that's disgusting!' That didn't sound right with this new voice. However Mom was probably right. This thing was just not going down.
'Well I'd better get on with cooking dinner. What's your plan? Maybe you could help me? Male help in the kitchen would be a nice change. Maybe having a task to do might be a bit of a distraction?'
That proved to be correct. The penis subsided when Mary stopped thinking about it. He helped Mom make some sort of spaghetti dinner. He felt ravenous.
When dinner was ready Sharon went to Mike's room to retrieve him from his game. The look of shock on his face when he saw this huge teenager wearing his clothes was priceless.
Sharon tried to bluff him. 'Mike have you met Grant, Mary's new boyfriend?'
'Uh. Hi. Um. Why are you wearing my clothes?'
'We got splashed by muddy water when we were walking back here. Your Mom said you wouldn't mind' Mary got up and offered a hand to Mike. They shook and Mary had great pleasure in squeezing as hard as he could. She couldn't help but notice Mike's wince.
Sharon almost giggled but managed to hold it in. 'Why don't you two talk while I hurry Mary out of the shower' she left the room but hid around the corner. She was eager to hear the conversation.
Mary ramped it up. 'You sister was telling me that you accompanied her up to the cheerleading competition. I envy you. Those cheerleaders are hot'
'Yeah, There were some good looking girls there'
'I also heard that you are a natural cheerleader and that you looked awesome in a black dress. I have to admire someone who is comfortable expressing their feminine side'
Mike could have died then and there. This was supposed to be their family secret. He would never live this down.
Sharon heard the conversation and quickly stepped back into the room. 'That's not funny Mary! Mike, meet your sister who is trying out having a penis for an evening. That joke is going too far! We never tell anyone about this medallion! Understood?'
'Sorry Mom. Sorry Mike. But did you see the look on his face?'
'I didn't need to. Imagine how you would feel if Grant discovered what you are currently doing. I think we make it a rule that some things we don't joke about'
'I said I was sorry'
'Well show it. You can serve dinner'
A contrite Mary did. The conversation from then on was actually quite civil. Over the meal Mike gave her strategies to keep an erection under control. Sharon listened carefully. After her boobs becoming male was possibly next on her agenda.
After his initial shock Mike was actually quite pleased about Mary being male. He was no longer alone in having a transgender experience. Even better Mary had done it voluntarily. It felt like he was somehow off the hook. She couldn't bring up his experience without fear of retaliation.
After dinner Sharon went to use the medallion on herself. Mary cleaned up but then challenged Mike to a wrestle. Mike accepted but was daunted by how much bigger than him Mary now was. As he expected he was comprehensively thrashed and Mary was thrilled with himself. 'I'm so strong. I can throw you around as if you are a child'
Sharon who had returned when she heard thumping in the lounge warned Mary 'Be careful. You don't know your own strength'
Everyone stopped to admire Sharon's chest. She was only wearing her new bra over the skirt she had been wearing earlier. She thought her cleavage was impressive and Mary readily agreed. 'Wow! that looks great!' His Mom really was very good looking. However he had to stop out of embarrassment when his crotch tented up once more. 'Sorry Mom'
'Don't worry son who is not really my son. It is actually quite a compliment' Sharon was very pleased. She liked the idea of turning on a teenage stud and it was very easy to forget that her daughter was inside that body. She decided then and there that she was keeping these boobs. That would mean buying more bra's tomorrow and eventually updating her wardrobe but if she got a job she could afford that.
By this stage Mary was eager to call it a night. He wanted to experiment with this body and Mike had offered a magazine for him to look at. Sharon was also eager to go back to her room and model outfits in front of the mirror. She needed to know which clothes would need replacing. Mike just wanted to get back to his game. None of them resurfaced that evening.