Two weeks before Paula's fifteenth birthday she had gone round to Bob and Jenny's as usual and the three had sat around chatting.

It was a bit of surprise when Jenny asked Paula if she'd like to watch her and Bob have sex.  Paula had seen people do it on video and on the internet and had heard mum and dad often enough so she thought she knew what to expect.  Paula nodded and Bob and Jenny exchanged a smile.

Upstairs Paula sat in the easy chair, Bob got undressed in an unhurried way, even folding his clothes before he lay on the bed naked.  Jenny stripped off more untidily and straddled over Bob facing Paula.  Paula could see how easily Jenny took hold of Bobs penis and lowered herself onto it.  It seemed to slide inside of her very easily.  Seeing how easy Bob entered her and the fun it seemed got Paula quite damp and crossed her legs to prevent her hand wandering down to her pussy.

Watching Jenny raise herself and lower herself on Bob's penis Paula imagined it was her. Jenny kept up a running commentary explaining to Paula the best angle of penetration and the best way to move herself.  She used her legs and one hand to move herself up and down and used her other hand to alternately stroke her nipples and reach down to touch her clitoris.

After what seemed to Paula like an eternity Bob said he was going to cum and Jenny doubled her movements until Paula could see Bob twitch upwards as his penis seemed to totally disappear inside Jenny. To watch and hear an orgasm for real was so much better than video or the internet.

Jenny asked Paula to hand her the box of tissues on the bedside table and when Paula handed them to her Jenny reached out to hold Paula's wrist. Jenny smiled and looking into Paula's eyes asked Paula if she wanted to do it.

Paula's mind raced, watching had made her wish it was her.  Paula's mother had advised her to have sex with an experienced guy the first time so as not to be disappointed.  Here was her chance.  Paula looked from Jenny to Bob and saw almost a desperation in Bob's face as he seemed to be trying to will her to say yes.  He smiled as Paula nodded, too dry in the mouth to say the word.

While Bob went into the bathroom to clean up, Jenny helped Paula to  undress.  She yelled to Bob to put a condom on and gently rubbed Paula's breasts and slit.  Paula was really wet but Jenny said to should use lube the first time.  Paula felt strange having Jenny rub lube into her with her two fingers while she stood there herself still with a wad of tissues between her legs.

Bob had come back and lay on his back on the bed. He seemed to have good stamina as his penis was hard again. Jenny helped Paula squat on top of Bob facing her.  Paula was having difficulty.  Although she could feel Bob's penis partly in her it didn't feel comfortable and didn't go in as far as she expected, certainly not as far as she could put a vibrator in.  Paula had discovered that her mother possessed three vibrators when she had put away the laundry some months previously.  She knew what they were; Jenny had shown her similar ones.  Being on her own that day she had taken the one shaped like a penis and tried it.  The noise surprised Paula and she wondered how she had never heard her mother using it.  That first time she had simply pushed the vibrator deep into her vagina.

Paula climbed off and lay on the bed.  Bob got on top but didn't put any weight on her at all.  His hands were out straight either side of Paula, and this time Paula could feel that he was right inside her.  Paula had expected it to hurt the first time but there was no hurt.  Bob had hardly had to push, with the lube it seemed to slip in  and keep going until Paula felt his hairs touch her own and the lips to her vagina.

Bob seemed to go on for hours but was only really a couple of minutes.  His penis slid in and out easily and she found herself responding to his thrusts by raising herself and pushing back.  Paula could hear his breathing and a kind of squelching noise each time he eased back, probably the lube.  Bob increased the tempo of his strokes.  Paula felt that light-headed feeling, her head was starting to pound a bit and she knew that her reddening was about to start.  The orgasm erupted as if her clitoris was playing a musical number all on its own, and Paula found herself  wanting the experience to last for ever. But Bob climaxed somewhat noisily and withdrew from her.

Paula was fascinated when he came out to see the little bubble at the end of the condom full of his cum.  Jenny gave Paula some tissues and after going to the bathroom the three sat there chatting about what had just happened and having a cigarette.  Jenny said the cigarette after sex always tasted the best,  Paula now knew that to be so very true.