I let her go at her own pace but I placed my hands on her hips and every once in a while, when she raised up, I would slam her back down. This had the desired effect of increasing her pleasure while still allowing me to watch out for passersby.
The stamina that this woman had was incredible and as we approached an hour of the most incredible slow fucking that I had experienced I knew that my wife would be wondering where I was. I told Rebecca that there was no one around but we needed to finish. I reached down and started stroking her clit while she would raise herself even higher and slam down on me pushing me deeper into her and closer to orgasm. I noticed her face was overcome with lust so before she started screaming with pleasure, I buried her face on mine and our tongues danced while she screamed into my mouth. She came first cascading down on my member and I responded by shooting what seemed like a gallon of cum into her.
I saw people in the distance so she climbed off and used my towel to wipe herself off. "Can't be jogging home with your cum dripping down my legs," she chuckled. I gave her a kiss and told her to change into her bathing suit and stop by. She should beat me there easily and hopefully some opportunity would arise.
When I was a quarter mile from home and dripping in sweat, I saw my wife's car approaching. She told me that she Rebecca was in the pool and that she was running to the store as we were going to have a cookout with Rebecca and her husband. I told her to take her time and she responded no longer than 30 minutes.
I sprinted home and changed into my bathing suit to join Rebecca in the pool. We kissed and I told her we did not have a lot of time. "I only have time to fuck you once," I said. "I can bend you over the side of the pool and fuck you from behind or I can fuck you standing up in the middle of the pool, your choice."
She pulled my shorts down and climbed up wrapping her legs around me. "I have never been fucked standing up so don't make me regret this decision as I love to be fucked from behind."
"Duly noted," I said as I moved her bottom to the side and entered her. Between her using my shoulders as leverage and my cupping her ass to increase the speed we developed a great rhythm. Once again, we had to kiss non stop to keep her from screaming as I hit every area of her sensitive married pussy. Fortunately, our timing was in synch as we came together about five minutes before we heard the car in the drive way and once again had to send my sperm to the filter.
Before my wife got out of the car Rebecca told me I was the only man who ever matched her energy and I now had two options. 1. Convince her husband to get in better shape so he could keep up with her or 2. Be prepared to fuck her a lot as she needed more great sex than she was getting.
This had been a great day and two hours later we were enjoying the cook out when Rebecca's husband asked me how my bucket list was going. I looked up to see both my wife and Rebecca staring at me with smiles although for very different reasons. "It is going great," I replied "Just today I checked off my number one box," I responded and waited for someone to ask. Rebecca looked nervous but my wife and her husband both asked at the same time, "Well?"
"I ran for two hours this morning which I have never done before," I declared "and I have never felt more satisfied." I turned to Rebecca's husband and asked him "I know there is no way we will keep up with Rebecca but if you want to get in better shape, I would be happy to be your workout buddy."
He laughed and talked about how he was in "Good Enough" shape. I let it go and could not bring myself to look at Rebecca as I am sure the look on my face would have got me in trouble. Deep down I was smiling as it was now an even better day.