At 38, Beth, an aerobics instructor at the local Y, is as beautiful as the day 15 years ago when we were married.

She looks at least 10 years younger than her age. In fact, her five-foot-eight body is as firm and trim as any 20-year-old’s.

Even though we’ve been fans of Penthouse Letters for some time, and often used steamy letters for foreplay, I have to say that our sex life was pretty conventional until recently, when we took a two-week trip to Italy.

Our tour group consisted of two dozen people we’d never met. We flew to Rome together, and were met at the airport by our tour guide, Rodolfo, a darkly handsome 30-year-old who looked like a classic Italian lover. The instant he saw Beth, by far the most attractive woman in our group, he was clearly attracted to her, and she took a shine to him.

As we began touring the Eternal City by bus, every time we got on Beth took the seats right behind the driver, with me at the window and her on the aisle directly opposite Rodolfo. She said that sitting in front helped with her motion sickness, since she didn’t feel so enclosed. But I noticed that whenever Rodolfo wasn’t describing a sight to the group, he and Beth were locked in private conversation.

This went on every day, and I was sure everyone in our group noticed the chemistry between them. Rodolfo also invited us to sit with him and the two travel agents at their table each night. And each night when we were in bed we had the most fantastic sex. I had to suspect that my wife was fantasizing about having Rodolfo between her legs.

After the fourth night I told Beth I knew that she was attracted to Rodolfo. At first she denied it, but with some prodding she admitted she thought he was hot. She said she was sorry but something seemed to draw her to him. I told her it seemed clear that he was feeling the same way about her. When she assured me he was just her fantasy lover, I shocked her by saying, “What if I let you sleep with him?”

She let out a gasp and said I shouldn’t joke about something like that. I said I wasn’t joking. She said, “You would let me do something like that?” And I said, “Yes, and I bet he’d jump at the chance.” In the end I said I would tell him it was okay for him to sleep with her — and she gave me the wildest fucking of my life.

The next day we were touring a Tuscan village, and when our group broke up for a couple of hours of shopping, I pulled Rodolfo aside and I told him I knew that he was attracted to my wife. He became apologetic, but I told him that Beth was attracted to him and it was okay with me if they slept together if he wanted. He jumped at the offer.

I told him Beth would come to his room that night at ten, but that she had to be back by two so no one discovered what was going on and she got some sleep. He agreed immediately.

That night Beth slipped into a pair of black leggings that hugged her body so tightly that they showed off her tight ass and outlined her slit. She also put on a low-cut top that hugged her chest. Rodolfo was drooling all through dinner, and I saw that Beth was aroused by the way her nipples pushed out against her top.

We returned to our room at nine, and Beth was on fire. She gave me smoldering kisses, then dropped to her knees and gave me her best blowjob ever, swallowing my entire load. Then she licked and sucked my balls until I was hard again, and kept sucking me until I let go another load down her throat. Afterward, I told her not to rinse her mouth out because I wanted Rodolfo to taste what she’d done.

She reapplied her makeup and sprinkled perfume on her pussy and between her breasts, then kissed me and left. I lay in bed with a raging hard-on all the while she was gone. At two in the morning she returned looking awfully well-fucked! By the light of the table lamp I saw that her hair was mussed and her lipstick was gone.

She peeled off her clothes and slipped in bed. During a steamy French kiss, I tasted saltiness in her mouth. She said, “Rodolfo said that if he was to taste you, then you should taste him.” I kissed her several more times, and she kept thanking me for letting her fuck him. Then, as I began working my way slowly down her body, I begged her to tell me everything that happened.

While I sucked on Beth’s breasts, she told me that she was naked within a half-minute of entering Rodolfo’s room. They had kissed and kissed while their hands roamed all over each other. He was pleased when he saw that her pussy was shaved bare, and he ate her to climax. While she told me this, I feasted on her come-filled pussy until she had an explosive climax.

Beth said that after calming down, she gave Rodolfo a spectacular blowjob. She said she was fascinated by his thick eight-inch cock because it was the first uncircumcised one she ever had. She said it was so thick that when he entered her, he stretched her walls like never before. She said they started making love in missionary position, then did it with her on top, then doggie-style. They finished with her on her back pulling her knees up to her chest while he fucked her ass. She was pretty sure she’d come more than once, but it was a blur because she became light-headed with euphoria. Her retelling of what happened got me so turned on that we made love three times before falling asleep.

In the morning we had to rush to get ready for the day’s tour. On the bus, as usual, Beth and I sat across from Rodolfo. I’m sure all the others saw them looking at each other nonstop.

For the next four nights Beth gave me terrific blowjobs before sneaking over to Rodolfo’s room around ten, returning around two with her pussy, ass and stomach filled with his seed. While I ate her pussy, she regaled me with every sordid detail of her tryst, and then we made love wildly.

After that fourth night, I told Beth I wanted to watch her making love. She smiled and said she’d been thinking about trying a threesome. That day she told Rodolfo to come to our room that night. He was at our door at ten, and Beth, totally naked, let him in. While they kissed like long-lost lovers, she tugged his clothes off.

The three of us got on the king-size bed with Beth between Rodolfo and me, and she started to kiss both of us. I saw what she meant about his cock being really thick! I slid down to her wet pussy and lapped at her slit. While she moaned, Rodolfo swung around so she could suck his cock, and I watched her head bob back and forth on his big tool. The room was filled with sounds of slurping and with Rodolfo’s groans of pleasure.

“I love the way your wife sucks my cock,” he panted.

I intensified my pussy-eating, and Beth moaned until finally she pulled Rodolfo’s cock out of her mouth and wailed as her body shook for ages. When she calmed down she resumed sucking Rodolfo’s cock, until finally he poured a copious load of come down her throat.

For the next three hours I marveled at how my wife reacted to this guy’s big cock. Every time he penetrated her she let out a moan or a wail. As he thrust in and out of her, she chanted, “Oh yes, fuck me!” I let him have her pussy as often as he could get it up while I concentrated on sucking her breasts or getting my knob polished.

Eventually Beth wanted us to fuck her at the same time. Rodolfo got on his back and she eased her stretched pussy onto his mighty shaft. I moved up behind her and slipped my cock in her tight ass. While we both thrust in and out of her, she growled like some kind of predatory animal. Finally she came furiously, and Rodolfo and I both emptied our balls in her. The three of us collapsed in a sweaty heap, then slept until the alarm went off.

Rodolfo spent two more nights in our room, and it was more of the same. Beth gave her body freely, trying every position we could think of. That last time, a couple of our tour members saw the three of us coming out of our room, but we didn’t care — it was none of their business.

Beth and I spent our last night in Italy by ourselves. Once we were done packing, we started making love, and kept going until we were spent. She kept thanking me for letting her sleep with Rodolfo, and showed her gratitude by the way she made love to me!