I stuck my head over the edge of my bed to see my twin brother Ritchie lying on the floor of my bedroom. He'd be sleeping here with me until Aunt Marge and Uncle Bert went home after Christmas.

"Ritchie," I whispered, "It's ok if you want to sleep up here with me."

"Oh God thanks Stephanie." He said scampering up into bed. With the doors closed my room got incredibly cold in the winter, especially on the floor. Mom said since we were both thirteen we couldn't sleep in the same bed, but I knew Ritchie would get sick sleeping down there. I didn't mind sharing my bed with him. We got along better than most brothers and sisters we knew, maybe it was because we were twins and growing up we'd always developed the same interests. I snuggled up against him to help him warm up.

"Thanks Stephanie," he said, still shivering, "You're a lifesaver."

"No problem. Just get down in the morning before Mom comes in."

Neither one of us was really sleepy so we decided to talk for a while. My room was in the basement and all the other rooms were on the upper story, so we didn't need to worry about anyone hearing us. As we talked, I realized how weird it was to be lying here like this chatting about school. I laughed at the thought.

"What's so funny?" He asked.

"I was just thinking that when we go back to school, you can really improve your reputation. Tell everyone one you spend the night with a girl."

He chuckled and lifted the blanket looking at my nightie. "A scantly clad one too. God I'd bet Keith would give his left nut to be here." Keith was a friend of Ritchie's from school.

"I doubt it. I don't think he likes me." Then I thought of something. "Did he ever mention wanting to be in a situation like this with me?"

"No," admitted Ritchie. "But then if he did I doubt he'd tell your brother. It's just a feeling I get from the way he talks about you. Would you want to go out with him?"

"Ugh! No!" I said, "I mean sure he's good looking, but come on. The skanks he goes out with? I'd rather die. I figure he knows I wouldn't put out for him so he's never asked me and wasted the cost of a movie."

"Probably, I mean he's my friend and all. But I mean there's more to life than getting pus... uh getting laid."

I smack his shoulder. "It's nothing I haven't said. But I appreciate you being a gentleman."

"Well," he explained, his voice took on a lofty professorially, "You're what we boys call: 'A Nice Girl.'"

"Ah, I see."

"Yes, when in the presence of A Nice Girl, cool guys avoid swearing and assholes swear as much as possible."

"A Nice Girl" I said, disgustedly. "They probably write that on my tombstone when I die a spinster. Why couldn't I be a member of the "Incredible Hot Babes" group?"

"Don't take it like that," he said, "I didn't mean anything... It's just that you and your friends are all so well behaved. That's all. It's not that we don't think you're all pretty."

I thought about what he said. "Can I ask you something Ritchie?"

"Sure, anything," he said quickly.

"I want you to be promise to tell the truth ok, no matter what."

"I promise."

"Do you think I'm pretty? I mean, it's ok if you don't, I know it's hard to tell with family."

Ritchie seemed surprised by the question. "Of course you're pretty. Don't you know that?"

I shrugged. "I don't know. I mean everyone kind of thinks they're ugly don't they?"

"Well take it from me," he said, "You're very pretty; if I weren't you're brother I'd ask you out in a second."

"Thanks," I said. "You answered one of my questions. Want to ask me something?" He shrugged noncommittally. We'd played Truth before. It was a little like Truth or Dare except you had to answer, no matter what. It wasn't really about winning so much as learning.

"Tell you what, tonight forget that I'm 'A Nice Girl, ' you can ask me anything you want."

"Um... ok. How big are your tits?"

I gasp and then punched him in the arm. "You Pervert!" I laughed at the way he winced and rubbed his shoulder. "Ok, a deal is a deal... 34a" Then I got an idea. "Ok my turn now," I said smoothly as though we'd both agreed this would be an ongoing game.

"Shoot," he said. If he was surprised he didn't show it and I was a little disappointed. I tried to think of a good question.

"Um... ok. How often do you play with yourself?" This time I got the shocked look I'd wanted. "Now don't try and deny it, I know you do it."

Ritchie swallowed. "Um ok... usually once day. How often do you do it?" I wanted to deny it but I had to tell the truth.

"About twice a week, sometimes three times... Who do you think about?"

"Girls at school... like Gina."

"Yeah, she pretty... I guess." It had surprised me. Gina was the captain of my gymnastics team and while she did have a pretty face, her body was small and underdeveloped. She was almost completely flat-chested despite being fifteen. I'd figured he'd be more into some like Ann, even I though she was cute, but there was a rumour going around that she was bi. I was about to tell him who I thought about when I rubbed myself off, wondering if he'd laugh when I told him my fantasy about a gynaecologist's exam conducted by Ben Affleck.

"Have you ever seen me... you know... doing it?"

Suddenly the game suddenly stopped being the slightest bit fun. I wanted to lie but then that would ruin the game anyway. When we played this game, I could only believe Ritchie never lied if I never lied myself.

"Once at Grandma's house... I was watching you through the keyhole." I'd hated myself for doing this because I knew I'd be pissed as hell at Ritchie if I'd caught him spying on me in the bathroom. "I've never done that before, but my curiosity got the better of me. Do you forgive me?"

"No. Was that your question?"

"Come on Ritchie I know you have a right to be mad but don't be like this. Come on?"

Without saying a word, he delivered a strong punch to my shoulder. I winced and rubbed my shoulder.

"Yeah, I forgive you." But he didn't sound like he meant it.

"Ok, you can have another turn," I said as a peace-offering.

"I'm getting kinda tired Stephanie. Why don't we turn in?"

"Come on," I said. I knew he wasn't really tired. "I said I was sorry and I meant it. What do you want me to do?" He didn't say anything. I guess I didn't blame him. Everyone says they're sorry when you have a right to mad at them. He wanted some kind of proof. I imagined him acting like this for the next three days and having to put up with it all day since we didn't have school. Then a strange idea came to me. It was really weird but I couldn't really see what was wrong with it.

"What if I let you watch me?" I offered.

"Pardon?" asked Ritchie. I had his full attention now, so much for him ignoring me.

"What if I let you watch me play with myself?" I asked. I figured it was no big deal, Ritchie had seen me naked lots of times and he knew I did this and turnabout was fair play, wasn't it? Really, it didn't bother me. If this was what it took to get him back then I didn't mind.

"Seriously?" he asked, "I mean you're not just asking this as a hypothetical situation?"

"I'm serious. If I let you watch me frig myself then will you forgive me?"

"Um... ok..." he sounded a little nervous. I shoved the blankets on to him and hiked up my nightie. I gripped the edge of my panties and lifted my butt off the bed. Just before pulling them off I turned to him.

"By the way, if you ever tell anyone about this, I'll pulverize you."

"Understood." Ritchie looked rather excited by this. He must have been really angry if he was this anxious to see me humiliated. Well if he was watching I might as well give him a show. I remembered something I saw in a movie and I slid my panties down over the slope of my butt and along my thighs. I sat up and slide them down my calves. I leaned back on my palms, leaving the panties resting on my insteps of my feet. I slid one foot from underneath, bending the knee up in a sultry fashion; I lifted the other leg six inches off the ground and kicked. The panties flew across the room and landed in my clothes hamper. I'd been practicing that for a couple of weeks. Pivoting on my butt I turned to my brother and spread my legs. Ritchie's eyes were peeled as he looked at me; this was turning out to be fun.

"You ever see a girl like this before?" I asked.

"Um... Andrew has some magazines... but that's all." I wasn't as hairy then as I am now, but I was least past the stage of baby wisps of hair. Compared to the girls I saw in gym class I was about average.

"Do you like the way I look?" I asked, and then I felt silly. What a dumb question.

"Uh... yeah... You look... great." I couldn't believe it. I was the one with no pants on and he was nervous. He began bunching up the blankets around his crotch.

"Thanks," I said. He looked at me and smiled and I noticed him looking at my chest. The cold had made my nipples hard and they were now poking tips in the front of my nightie. I began to rub my lips, tracing the outer edges, and then I moved to the top and pressed down with my fingertips while rubbing in a circle. My body responded much faster than it usually does. I was already moist when I started and before long I was dripping onto my bed sheet. I usually just rub the outside of my vagina, but this time I slid a finger inside myself and wriggled it. I switched hands and brought the wet finger up to my mouth and sucked it clean. I wasn't sure why I was doing this. I guess I just wanted to appear wild and exotic to Ritchie. I sucked on my finger like a Popsicle. It tasted funny, but not bad. That had always seemed dirty but now I kind of liked the thought of being dirty. I could feel the orgasm coming; taking my finger out of my mouth, I began caressing my breast. My other hand was moving really fast now. Ritchie was so close I could feel his breath on the back of my hand.