Wife Thanks the Co-worker

Derek was a junior agent at the firm that my wife Cherry worked. He had been there for the two years since he had moved away from his home town and was progressing well until his mother had fallen ill and he had submitted his resignation to head back home and spend some time with her. He was well liked by those at the office and they were all sad to see him go. Although he was a bit of geek he was always willing to assist the other agents. In particular he was always keen to offer assistance to Cherry and she always welcomed the help. I had no doubt that it was because of Cherry's good looks and curvy figure but she insisted that he was just a nice guy that was keen to learn. I always teased her that he would love to learn what her d cups looked like. Derek was a few years younger than Cherry and the few times I had seen him in her company I could see that he was very fond of her.
The firm has arranged for a send off on the Saturday after his final day before he headed back home on Sunday morning. True to form he had offered to help Cherry do mail box pamphlet drops in the morning before heading to the send off at 3pm. Cherry used the walking on the mailbox drops as a good workout and today was no exception. She wore a crop top and short denim skirt along with a pair of runners. The crop top exposed her flat stomach and accentuated her heavy chest and I has a inkling that this was part of the reason Derek always offered to help her out. I teased her about all the help he had given her and jokingly suggested she should do something to help him out. I was in a horny mood knowing that Cherry would most likely pick up a stranger later that night and I would watch her fuck the lucky guy. This was a regular thing for us and we both enjoyed it very much.
Derek arrived on time and they both left, I occupied myself for the rest of the morning and was working in the office when I heard Derek's car arrive. They both came inside and Cherry found me working in the office while Derek was having a cold drink in our lounge. Cherry was tired from her mornings work and said her feet were sore from walking. This was a hint that she wanted me to rub her feet before she went out later in the afternoon which I was was always happy to do for her as I knew how much she enjoyed it. She kicked off her shoes and socks and I gave her feet a little rub before suggesting that she should go back and see Derek out or maybe see if he was willing to give her feet a rub before leaving and maybe she could give him a little peek up her skirt while she was at it. She swatted my hand playfully and told me I would just have to wait until later for that kind of thing. As a parting comment as she left the room I remarked "poor Derek" .
I sneaked out behind her and watched as she topped up Derek's drink at took a seat on the other end of the couch as they chatted. I could see him stealing glances at her big tits which completely filled the crop top she was still wearing. Derek has his side to me so didn't know I was there but Cherry had seen me watching them. I was a little surprised when she told Derek that her feet were really tired and she wasn't sure she could still go out that afternoon. She said her hubby normally rubbed them for her but he wasn't home until later in the day. Of course Derek was horrified that she may not be going and immediately offered to rub her feet for her. She said that wouldn't be necessary as it would not be nice for him but he insisted and was not going to take no for an answer.
Cherry swung her legs up onto the couch and rested her feet on Derek's lap and I looked on as he started to massage her feet. Cherry had laid back and pulled her skirt tight so that she was covered and then relaxed as Derek worked away at her feet. Cherry had closed her eyes and now Derek was taking long looks at her legs and then her thinly covered tits. I saw him adjust his manhood and knew right away that the poor guy had a hard on. Cherry bent her outside leg a little to give Derek better access to her foot with his thumbs which opened the view up her skirt a little. Cherry wears a g string that would have covered her pussy but given a better look than he had before. She shuffled her other foot right over his crutch and feigned shock and apologized when it landed on his hard cock. Derek blushed and made his own apology as he gently moved her leg away. Derek continued the foot rub for another 20 minutes and finally said he should be going soon so they can get ready for the afternoon. Cherry sat up and thanked him for the massage and said she had felt much better. She took us both by surprise next when she put her hand on Derek's leg and asked if she could do him a favor in return before he left. Derek didn't know how to respond and still hadn't spoken as Cherry placed her hand on his crutch and said "I can help you with this if you like" as she started undoing his pants. Derek was paralyzed, he just sat there as Cherry whipped his cock out and held it in her hand. When she was sure it was fully hard she sat astride him, pulled her string aside and slid down onto his cock until he right inside her. She pulled her top off over her head and took each of Derek's hands and placed them on each of her tits and then started grinding her hips against his. Derek awoke from his trance and took one of Cherry's nipples in his mouth and went to work on it. Cherry leaned forward more and was riding then length of his cock now and I could see the shaft going in and out from my vantage point. They fucked like this for a short while until I saw Cherry grind down hard and knew she was cumming. Derek gave a groan and joined her as I watched on imagining his load shooting inside my wife's eager pussy.
It all happened so fast and in a short while they were both dressed again. Neither discussed what had happened and only spoke when Derek left and asked Cherry if she wanted him to pick her up later that day. Cherry said that would be nice and watched as her walked to his car before closing the door and coming back into the office. I asked her what had changed her mind and she replied that it was my "poor Derek" comment and that there was nothing to lose since he was leaving the next day. She said she had enjoyed the "quickie" and headed for the shower to get ready for the rest of the day.
Derek pick her her up on time and they left to meet the others at the local bar. I knew I wouldn't see her until the early hours of the next morning and spent my time stroking my own cock as I watched some porn on the net. These waiting hours always excited me and the text from Cherry that said she was on her way home with someone was always a much anticipated moment. I would make myself scarce as her and her new friend came inside and then settle into a good viewing position to watch them fuck. Tonight was no exception and I received the message at about 1 am. I had gone to our bedroom to wait and kept quiet as they came into the lounge room. I listened as they laughed drunkenly and then heard the guy that she had to use the bathroom. She came into our room got out of her clothes and changed into her nightie without bothering with a bra or panties. We both knew she would be naked soon anyway. She kissed me on the mouth and I asked how she met her new guy. She grinned at me and told me it was Derek again I was little surprised and asked her how that had happened. She asked if I had noticed how thick Derek's cock was earlier today. I hadn't noticed at all because it basically spent the whole time inside her. She told me that his cock was thick at the base and she wanted to fuck it again. With that she turned and left the room to join Derek on the couch again.
This time there was no awkward moments, she stood in front of him and dropped her nightie off her shoulders before going to her knees and pulling his cock out. She sucked him until he was hard and then put his cock between her tits and titty fucked him until he came all over her tits. Cherry laid back on the couch and let Derek eat her shaved pussy until he was hard again and then asked him to fuck her hard. Derek obliged and rammed his cock inside Cherry until she bucked with the onset of her own orgasm. Derek wasn't finished and as she was still panting rolled her onto all fours and fucked her from behind until he was ready to cum and then took a firm grip on her hips and pumped it as far inside her as he could. The both collapsed, exhausted and spent. Cherry had got Derek of three times that day and he didn't look to have any juice left in the tank. Before he left she thanked him again for all his help and wished him all the best. He also thanked her and said his goodbye.
Cherry endured a good fucking from me before we went to sleep, happy with the events of the day.
We were having breakfast the following morning when there was a knock at the door. Cherry went to answer it and came back inside with Derek following her much to my surprise (and Cherry's by the look on her face). He said he just wanted to say goodbye again and mentioned that he might drop into the office in three weeks time when him and his brother come back to pick up his furniture. I asked where he would stay and he said that they would get a hotel. I said that wouldn't be necessary and insisted that they come and stay with us. Cherry gave me a sideways glance but couldn't really say anything. Derek was really appreciative and accepted the offer. After he left Cherry punched my arm and told me that I was a pervert. She knew only too well that she hadn't seen the last of Derek's cock and most likely would be introduced to his brothers cock as well.