MY SISTER HAD FALLEN to the foot of the stairs and was lying with her skirts all topsy-turvy. Even when she saw me standing right beside her, she made no effort to get up.

It was as though, from fear and the shock of her fall, she had been struck by lightning. Thinking she was merely trying to frighten me, I let my curiosity get the better of any feelings of pity I might otherwise have had.

My eyes were riveted on her nakedness. Where the lower part of her belly joined her thighs, I saw a peculiar elevation in the form of a fleshy triangular mound, on which a few blond hairs were visible. Approximately where the thighs joined I noticed that the mound was cleft by a large crevice about an inch and a half long, on either side of which two lips opened left and right. I glimpsed the spot where that cleft came to an end just as my sister started to scramble to her feet.

She probably had not had the faintest notion that she was lying so exposed, for otherwise she would immediately have arranged her clothes. But suddenly, as she drew her feet down beneath her, her thighs spread and I noticed that the lips, only part of which I had seen when the thighs had been closed, continued until they came together near the buttocks.

During this quick movement of her legs she had half-opened her slit, which at that time must have been from three to three and a half inches long, and I was able to see that the flesh inside was red, in contrast to the milk whiteness of me rest of her body.

Only one spot between her thighs, near the lips, was slightly red. But that pale red had doubtless been caused by sweat and piss.

The width of a few fingers separated her cunt, whose form resembled the split in an apricot, from her buttocks. There in all its splendor lay Berthe's pot-hole, which I glimpsed when she turned her back to me as she was getting up. The hole, of a darker color, was no larger than the tip of my finger. Between her cheeks the skin was slightly reddened by the sweat which the day's heat had provoked.

My curiosity had been so aroused that I had not realized how badly my sister must have hurt herself in falling, but finally awakening to that possibility, I flew to her rescue. That whole scene had certainly not lasted for more than a minute. I helped Berthe to her feet. She was unsteady on her pins and complained of a headache.

There was of course an ample supply of cold water in the courtyard well, but had we gone there we would certainly have been spotted and called to account, with the result that all further excursions throughout the chateau would have been forbidden us. So I suggested that we go to the little pond at the end of the garden which we had one day espied from the rooftop.

Upon reaching this spot we found, almost hidden among dense undergrowth, some artificial rocks, where a spring flowed into the pond.

Berthe sat down on a stone bench. I made some compresses with our handkerchiefs. She was slightly overheated and out of breath. But it was well before noon, and at the end of half an hour she was feeling much better, although she still sported an impressive lump on her head. Fortunately, however, her hair concealed it.

During that half hour I had catalogued all I had just seen, and fully enjoyed letting my mind linger over these new discoveries. But I had no idea how, in the light of them, I should act with Berthe.

Finally I decided what I should do: while Berthe had been lying there naked I had noticed that under her feathery bush she had a beauty spot at the point where her cunt ended.

It so happened that I had one too, in exactly the same place, just behind my balls.

My mother and aunt had one day looked at it laughingly, and I had never understood why.

Later I had examined my buttocks in the mirror and discovered it.

When I told Berthe about it she appeared surprised and blushed profusely. At first she pretended not to understand, and when I carefully described its position to her, stretching out on the ground with my legs spread to show her how I had happened to see it, she became horribly embarrassed.

I had to make sure that we were alone in the garden. The surrounding vegetation was high enough to hide us from any distant eye, and we could easily see if anyone were approaching.

I unbuttoned my suspenders and, letting fall my light summer trousers, lay down on my back directly in front of my sister.

"Oh, goodness, Roger, if anyone were to see you!" she said half-aloud, without, however, shifting her gaze.

"There's nobody around here, Berthe," I replied in the same half-hushed tone. Then, getting up, I stood in front of her, lifted my shirt and said: "Since I saw all of you, you can see all of me."

Berthe's curiosity was aroused, and she looked at me without constraint. Her gaze was beginning to affect me; my member began to stir, then rose and, stiffening, bared its head.

"You see, Berthe, I piss out of that little hole, but now I can't, even though I want to."

"I've had to go for a long time," she said softly, "but I'm ashamed to. Don't look at me, Roger."

"Now, Berthe, don't be such a prissy. If you hold it too long your bladder will burst and you'll die. That's what our old nurse used to say."

Berthe got up, glanced all round, then squatted beside the bench and began to piss. I bent down quickly so as not to miss a trick, and saw a thin but steady stream spurting from the top of her cleft and falling obliquely to the ground.

"No, Roger!" she said tearfully, "that's not nice."

She finished pissing and stood up.

"But Berthe, nobody can see us," I protested, "don't be like that."

I smiled and added, "Look at me, I'm not shy in front of you." I began to piss, but in jerks, because my member was still stiff. Berthe burst out laughing. Taking advantage of her good mood, I deftly raised her skirts, forced her to squat and made her piss.

She no longer resisted, but spread her legs and bent forward slightly. I saw the stream which fell to the ground with a splash, before it slackened off. My sister seemed to be forcing at the end, and her crevice opened near the top, revealing the red flesh.

All this lasted only a few seconds. The stream had dried to a mere dribble.

Suddenly I seized the lips of her Lady Jane and drew them apart. She seemed to enjoy it immensely, for otherwise she would never have lifted her skirts so obligingly.

In so doing, I discovered that her crack, which might be compared to a half opened mussel, contained two additional lips, smaller than the outside ones. These inner lips, a beautiful red, were shut tight. At the top was the little hole through which she had just peepeed. A little jut of flesh the size of a pea was also visible. I touched it and found it to be extremely hard.

My caresses seemed to please my sister, for she remained motionless, pushing her belly out slightly.

She became very excited and lifted her skirt even higher, to above her navel. Then I caressed her belly, moving my hands exploringly across her flesh. I tickled her navel and tongued around it. Then I moved off to get a better view, and saw for the first time the lovely down adorning her soft rectangular mound.

The hair was sparse, short and downy, so blond that one would really have had to be close to see it. Not that I had much more myself, but mine was darker.

I twisted the hair a bit and told Berthe how surprised I was to find that the color of our pubic hair was so different.

"It's always like that," she replied.

"How do you know?"

"Kate told me so once when we were alone in the bath. Besides, I'm going to have my periods soon."

"What are they?"

"There's a flow of blood every month for several days from your Lady Jane. Kate had her periods and hair when she was my age."