Petra and I have known each other since we were undergraduates.

We were best friends first and only later became lovers. She’s warm, personable, smart and very pretty. She dated quite a bit before we married, and while I wasn’t exactly celibate, I actually had less sexual experience than she did when we finally got together.

As Petra approached 30, she really got into maintaining her youthful appearance by exercising rigorously and experimenting with makeup and dress. To celebrate her birthday we held a blowout party, and she was a knockout in a dress that showed plenty of cleavage, legs and back, displaying her 35C-24-36 figure. All the compliments gave her a buzz.

After that Petra started really getting off on showing off her figure, especially the reactions she got from men. Not infrequently she went without a bra and even without panties under her short skirts and dresses. She also became quite flirtatious. The only place that this behavior wasn’t evident was at work. As a secretary at a staid corporate law firm she was obliged to dress more conservatively and act in a more restrained manner. But now that has changed too.

Two months ago Petra left that job to become the office manager and secretary for Luc, a criminal lawyer with his own small firm. She met him when her old firm brought him in as a consultant on a case defending a publishing company that put out pornographic magazines. Most of his clients are in sex businesses — pimps, hookers, strip-club and massage-parlor owners, and so on.

Luc is a tall, handsome but rough-looking guy in his early 40s, and my wife was taken with him from the time they met. I couldn’t recall her ever talking about a business associate as much as she did about him. So I wasn’t really surprised when she announced that he had made her a job offer and she was going to take it. It paid a little more than she was making — and besides, she said, she could be more like herself at work.

During the previous year Petra’s libido had intensified considerably. There wasn’t a night when she didn’t want to have sex. If I couldn’t get it up, I would tongue and finger her to orgasm. Also, she was also always ready to give me a blowjob, which in the past had been limited to special occasions.

When Petra went to work for Luc, her blatant sexuality took another upward turn. She dressed for work the same way she did outside the office. She said Luc’s clients liked it and so did he. She also began coming home late several nights a week, claiming she’d had to work overtime, but she often smelled as though she’d been drinking, and sometimes I thought I detected a just-fucked look on her face. About that time she also began to shave her pussy.

One night a few weeks ago she came home with a gold ring through her pussy lips, not far from her clitoris. That’s when I finally asked what the hell was going on.

Petra didn’t turn a hair. Matter-of-factly, she said she and Luc had become lovers, even before she started to work for him. He’d seduced her in his office when she brought him some papers to review from her old firm. After that she’d met him a few times when I was out of town on business. One time he brought along two of his clients, both rough guys involved in criminal activities, which thrilled her to the bone. She wound up sleeping with all three of them, and said she’d never come so much. That was when Luc offered her the job.

Since then, Petra said, she had gotten laid regularly by Luc and his friends and clients. She had gotten quite good at dealing with big cocks, now taking them easily in her mouth and cunt, and Luc was breaking in her anus. She got the piercing, she said, to intensify her orgasms and to keep her horny most of the time — not that she needed it for that! The bottom line, she said, was that she just loved rough sex, especially with shady guys with big dicks.

Naturally I was shocked at first. But as Petra went on telling me about the things she did with Luc and his friends, I got turned on. She saw the tent in my pants and sat on my lap. She gave me a deep wet kiss and played with my throbbing dick. We screwed, and it was the best sex I’d had in years. This Friday evening Petra and I are going to a party Luc is giving for some of his clients. I can only imagine what’s going to happen.