I was recently asked if I write about sex after spanking and replied "sometimes..." This is a sample from my book
http://www.lulu.com/content/3982237

...I decided there was only so much a man can take and resolved to end this as quickly as possible. I knew my excitement was at the sight of my beautiful Caitlin but I was not comfortable feeling such waves of lust while beating my wife! Caitlin let out a little gasp as I pulled her firmly towards my chest in readiness for my planned tattoo on her bottom. I assumed she was expecting six smacks and I did not wish to make her wait longer than necessary and prolong the agony. Nor did I wish to feel that erotic slide over my straining penis as I spanked my wife. It was too disconcerting.

As soon as I had Caitlin firmly held against me and before she found her feet my hand was raised and I delivered a resounding thwack to her lower cheeks, just above that charming little gap at the top of her thighs and a few inches above her pushed down pink panties. Once again her legs jerked, she howled in pain and sort of fell against me sobbing in earnest. While her legs and bottom did their mesmerising jig and she was mid-howl I was ready to land her fourth smack over the first, red handprint. As I delivered this firm spank to the sweet mounds her sobbing turned to a moan of pain and I felt her go limp against me and I felt her slide back over my lap as I inadvertently loosened my grip.

I could hardly bear her pain or the pressure on my poor throbbing flesh as it too danced with the sobbing woman over my lap. The fifth spank earned a shudder but did not break the apparent heart-breaking tears of my sore-bottomed wife. It was delivered firmly over the fleshiest part of her buttocks and was immediately followed by a stinging slap just above her thighs.

I don’t know if Caitlin had been counting but although the sobbing continued I felt a relaxation as she continued her tearful outpouring. I hoped she’d forgive me although the spanking was delivered on her insistence. My own throbbing had subsided a little but I was very aware of my continued excitement and was trying to resign myself to a lack of satisfaction as I concentrated on soothing my sobbing wife. I tried not to be aroused by that shuddering bottom bearing my imprint. I tried to ignore her lovely long legs stretched over me. I tried not to think of her breasts, draped over the chair. I tried not to notice the glimpses of her sweet honey pot as she wriggled over my knees. I tried to keep my caresses of her sweet bottom purely solicitous. I did not intend to arouse her or me but she was so adorable and sexy that I could not stop my lustful thoughts. I resigned myself to my temporary chastity and became aware of a stillness as Caitlin’s tears and wriggles seemed to end.

Caitlin put her hands on the arm of the chair and pushed herself to her feet. Her dress fell into place and as I thought that her panties were still around her thighs I noticed her straining nipples pushed against the fabric of her frock. I also saw the unmistakable look in her eyes that told me I might not be going to bed nursing my unrequited lust. Caitlin moved in front of me, eyes gleaming despite her tear streaked face and the remaining shudders of her heart wrenching sobbing.

Astonishingly, she dropped her eyes and whispered ‘Thank you, Winton’, followed by that famous full-eyed gaze of hers. Such a look could always bring me to attention but my already straining penis could only twitch in acknowledgement. My eagle-eyed Caitlin did not miss this as she smiled and lightly touched her breasts. I was mesmerised. Our sex life is wonderful but since the children and our new home it has tended to be rather circumspect. Admittedly, we got little sleep the night we christened our new bed but it was a while since Mrs. M’Bakwe had provided such a lewd display for her enthralled husband.

I stared at Caitlin’s nipples so visible through the thin stuff of her frock and saw their straining match the eagerness of my restless flesh. I thought about those sweet pink panties hugging her thighs and displaying her delectable pussy and sore bottom. I imagined the dampness of those thighs as I saw the look in my young wife’s eye. I realised that she too was ‘gagging for it’ as she so charmingly puts it.

Now I was drawn to her hands as she slowly unbuttoned the top button just below her throat. This was carefully followed by the second, then third and fourth button. Although her nipples continued their pressure against her frock her breasts remained practically hidden by their thin flowery covering, merely affording me a glimpse of the shadowed secrets of her adequate charms.

Caitlin’s breasts were small but had the fullness of her motherhood still. These were sweet breasts but not virginal despite her youth. As I strained to see more of her gorgeous breasts I remembered them at their fullest and my enjoyment of my wife, the little mother. As I strained for a sight of my wife’s breasts Caitlin slowly eased the open bodice of her frock apart and exposed herself to me. The material was pushed aside so it surrounded her breasts but displayed them fully. She was still ‘buttoned up’ from the waist down and she stood there with her breasts rudely exposed in front of me in our living room with her demure little dress framing her upper charms and modestly hiding her otherwise bare bottom and pussy.

I desired her so much but was transfixed by the antics of my naughty wife. Thankfully Caitlin is not a cruel woman, but her sudden graceful drop to her knees in this provocative state of undress confused me for a moment. As my bare-breasted, pantie-lowered young wife knelt before me she gave me a look of pure innocence as though unaware of the astonishing picture she presented. Why, she could have been a nun; a virgin at prayer but her panties were still around her thighs and her breasts were fully visible as my little ‘penitent’ knelt before me. The look of innocence was replaced by one of greed as Caitlin reached forward and unbuttoned the waistband of my straining denim and looking me in the eye, slid down the zipper of my jeans...

But if you can't wait, this particular story is also here:
http://suzeemoon.friendpages.com/
Go to 'Articles' and it's 'Winton's Tale'