Our neighbors asked us for a favor.

Mike and Carol, early 30s, moved in across from us about a year ago and we became instant friends. Carol worked in the doctor's office my wife work in and Mike is a golf pro at the local private golf club. He and my youngest son became good friends and now he gets free lessons and playing privileges.

Carol is a talker and quickly shared personal information about her and Mike and their journey together. Not long after they got married, Mike was diagnosed with testicular cancer. He was able to beat the cancer but it left him sterile and impotent so no children. Both were disappointed but excited about adoption in the future.

One Saturday evening, we had Mike and Carol over for dinner and to hang out. After eating, my wife, Kat, wanted to show them our vacation pics from a few weeks ago. We all settled in the living room and Kat connected her phone to the TV.

She was going through the pics, talking about them and not paying attention to her phone. She was just looking at the TV, swiping away. As she went to get a drink, Kat swiped and Carol quickly gasped and I laughed. There was a pic of me naked, fulled erect. Kat looked up, cursed and swiped to the next pic. Still laughing, I said, "and that's me." Mike started laughing and Kat punched my arm, blaming me for the pic. I told her it was her phone and she took the pic. The rest of the evening was a little awkward but no more nudes were shared.

Nothing was said between Kat and I about the pic until the next Friday. She told me that Carol came up to her at work that morning.

"Carol came and talked to me about the accidental pic the other day. Before I could apologize, she told me that her and Mike talked about it. In fact, Mike brought it up first. He told Carol that he loved her more than anything but knew she needed more male attention than he could give her. He suggested to come to me and ask if you would have sex with Carol. Carol said no at first but he brought it up again and she thought about it and said she would think about asking.

She asked Mike later if he was sure if thats what he wanted. Mike said that as long as he didn't know details but to let him know where she's going, he was fine with her getting fucked once a month or so. I was shocked but told her I'd think about it."

I was also shocked. I knew about their situation but I guess he thought she needed more. Kat went on.

"Carol said there would be no feelings, good or bad if I shared you. When she thought about it more, she missed a real dick. Oral sex and toys could only do so much, she said. Plus she missed cum. She said she loved cum but Mike can't cum and would love to taste me."

Hearing all of this was getting me hard. Carol is a very beautiful woman. She came to the US from the UK when she started college.Tall, long brown hair, brown eyes, a nice figure with probably B cup boobs. Kat noticed my erection and grabbed it.

"Don't be so excited. I haven't given you permission to fuck her yet."

That evening, I went out in the backyard and built a fire. Usually when I do that, Mike comes over and he did. He was hesitant at first but then told me everything that Kat had told me about his and Carol's idea. He said he trusted me to take care of his wife and if it did happen, he didn't want me to say anything to him. He'd get details from Carol if he wanted them. I agreed, if it happened and he seemed satisfied.

That night in bed, Kat was giving me a top notch blowjob. I was getting close to cumming when she stopped. I figured she would climb on top of me but she rolled away from me. When I asked why, she said, "You need to save your cum for Carol."