The girls arrived at my place just before dinner, each carrying a bag. I couldn't resist the tease. “What's in the bags?” I said with a wink.
Veronica said, “Clothes and stuff.”
“Clothes?” I said. “You're not allowed to wear clothes here; we spend all our time naked, unless we go out in public. Right, Donna?”
“Absolutely,” Donna said and started unbuttoning her shirt.
A look of pure horror raced over Veronica's face.
Donna and I burst out laughing and poor Veronica realized it was all a joke.
“Sorry,” I told Veronica.
“Ha ha,” she said, “and here I was just about to get naked!”
I gave her a curious look and she stuck her tongue out at me.
Then I gave her a look that said “I'd sure like to see that” but I'm not sure if she caught it.
Did I? A 13 year old girl naked? Why the hell not.
Veronica put her stuff in the spare room and Donna carried her bag right into my room. Veronica seemed shocked at this wanton display of impending sin, but she didn't say anything, just observed wide-eyed.
We finished off the day with dinner and television. After watching TV for a while Donna decided to get ready for bed. She disappeared into the bathroom and returned a few minutes later wearing one of those oversized T-shirts that girls like to wear to bed. She sat down with me on the couch again and said, “Veronica, you can get ready for bed if you want, unless you plan on going out tonight.”
Veronica got up from the easy chair she was sitting in and headed for her bedroom. She stopped halfway there and turned and asked, “Is it okay if I take a shower?”
“Please,” I said. “There's a towel for you behind the bathroom door. Make yourself at home.”
She responded with a nervous smile. A few seconds later we heard the bathroom door close. At that sound Donna took my hand and placed it between her legs, under her T-shirt. I was delighted to find she wasn't wearing any panties and I immediately set to work stimulating her with my hand. I slowly applied pressure and gently rubbed her mound. She was wet and I continued my ministrations to her pussy and could feel her juices seeping out of her and onto her thighs. I slipped a finger down and entered her. I fingered her through an orgasm. Both of us were to preoccupied to hear the bathroom door open later. Having caught movement out of the corner of my eye, my attention was drawn to the other room where I saw Veronica standing there with her mouth hanging open, watching me finger-fuck her sister while I had my tongue down her throat. I watched her reaction without letting on that I knew she was there and after a couple of minutes she retreated into her bedroom.
Five minute later we heard the bedroom door slam and Veronica called loudly: “Donna, can I borrow your hair dryer?”
I smiled to myself and before Donna could answer, I said: “Use mine, it's under the sink.”
We heard the hair dryer start up and run for a few minutes before it shut off and the door slammed again and Veronica called from the hall: “Does anybody want anything from the kitchen before I come in?”
“No thanks,” I answered back.
She was trying to warn us she was coming into the room so she wouldn't catch us again. If Donna knew what her sister had seen…
The rest of the evening was TV and chit-chat and I invited Veronica to join us the following day. We had planned a picnic in Balboa Park. Veronica thrilled to be included. Donna gave me a dirty look.
In bed, I explained to Donna that if we were going to spend two weeks together it was better to make her a friend than ostracize her. That way she would give us our space when we wanted it and they would get along better when their parents returned, hopefully no more blackmail.
We made passionate love that night, calling out each other's name plus a few oh Gods and Jesus fucking Christs, moaning and groaning and screaming and I knew I was being louder than usual. It wasn't until morning that I realized we had left the door open and I think, subconsciously, I wanted that. Yes, I wanted Veronica to hear us.
The next few days went well; Veronica was at ease and the girls started to get along better. It was the fourth night we were together that I realized how close we were becoming.
We all went to bed at the same hour and I did not close the bedroom door, on purpose now. Donna and I spent the usual amount of time having sex, at least an hour and a half, sometimes two, depending how many times I could get it up. We stroked each other, I went down on Donna and ate her pussy and made her come twice, trice, then I got her up on her hands and knees and fucked her from behind, and before I was finished I lay down and she rode me until we came together. I was satisfied but Donna was a nymphomaniac and wanted more, so she crawled over and started to suck me into her mouth to coax my dick back to life. If I couldn't get the solider ready for another sortie, she would masturbate and then I would go down on her. I started to imagine doing this to Veronica and that got me up again. To do these nasty things with a 13-year-old cutie pie! Oh, I was a bad, dirty old man all right.
And then, on the fourth night, it was while I laid there on my back getting a very satisfying blowjob that I glanced over at my dresser and in the mirror I saw a sight I will never forget. In the mirror I could see Veronica in her bed. She was stark naked, exposing her beautiful 13 year old body to the air and the moonlight spilling in through her window and falling across her bed. She had her right had furiously fingering herself while her left was pulling at her nipples. It was plain to see that her gaze was fixed the same place mine: the mirror. She was watching her sister suck my cock and making herself come.
At first I thought this was my imagination getting the best of my eyes, but no: this was the real thing, and the little girl had been doing this, most likely, every night, getting a good view of every dirty bed thing. I found myself wishing I had introduced Donna to anal sex (she wasn't ready but curious) so Veronica could witness me packing her sister's fudge.
This little nymph watching and jilling herself off excited me and I figured I would give her something to really watch, ass-fucking aside. I pulled Donna's legs over me so she straddled me in the good ol' 69 position and I went to work on her pussy. I ran my tongue up and down her slit, sucking her lips into my mouth then flicking at her clit, then stabbing into her hole and wiggling it around. A few minutes of this attention and Donna exploded on my face-and I do mean explode, as a stream of fuck juice spewed out and splashed my mouth. I slurped up as much of the juices as I could and turned her around so I was on top and fucking her mouth. All the while I kept an eye on the mirror, watching the watcher. As I shoved my cock into Donna's mouth, making her gag now and then, I started to talk dirty in a loud voice. I told her how much I loved the feeling of her mouth around my cock and how good she tasted, how I loved when she came in my mouth, and how I wanted to come in hers. “I want you to eat all that sperm, you dirty whore,” I said, “I want you to be my cum-hungry slut!” Donna liked this talk and she took my cock into her mouth to the hilt, her pelvis slamming into her cheeks. From what I could see, this was having a similar effect on Veronica, as she was now ramming what had to be at least 3 fingers into her little pussy and pulling her nipples so hard I thought she would rip the flesh off.
This was just too much for my mind and I started shooting sperm deep into Donna's throat. She choked on it, spat some up, and tried to swallow what she could. Veronica had her own load orgasm that I could clearly hear, and I watched as she lay slack on her bed. I pulled Donna up to me and wiped my semen off her chin and chest and made her suck the remains off my finger. There was some in my crotch and pubic hair; I scooped that up and Donna ate it all, humming as she did so, her eyes closes in ecstasy. Out of the corner of my eye, I saw Veronica observe with a curious tilt of her head, and she was still rubbing her pussy.
Donna curled up beside me and I drifted off to sleep with her, knowing we had an audience and liking it.