Part 1 of this series was posted under "Mature" and parts 2-4 were in "Erotic Couplings".
A brief summary to this point: Ron has recently started sleeping with both Sandy and her mom Pam. One night Ron and Sandy secretly watched their moms fucking. During Sandy and Ron's next fuck they began some "dirty talk" about their moms.
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The next day he left early to get back to campus. As he drove back he reflected on his spring break and laughed that he certainly had a much wilder time than any of his friends would have had on their trips. When he returned to his small apartment he was excited to find that Sandy had already left him a message.
Throughout the rest of the school year Sandy and Ron talked often on the phone and exchanged frequent e-mails. She came up to visit him several times on campus and each time they spent just about as much time in bed fucking each other silly as they did out exploring the city's nightlife.
At first Ron had thought that her previous talk of involving their moms in their fucks was just something she said in the heat of her own passion and didn't really mean. It wasn't until her second visit to campus that she brought the subject up again. This time, however, it wasn't during the excitement of their sex when she raised the subject. They had just finished their first fuck of the night and were comfortably lying in each other's arms when she asked, "So have you been thinking about us fucking our moms?"
The casual way she tossed out the question surprised Ron and he had to stop and carefully consider if he had heard her correctly. She raised her head and looked up at him and saw the vague look of surprise on his face.
"Don't play all surprised with me," she teased, "I know you remember talking about it and I remember how hot it made you. So, have you been thinking about it?"
"Yes," Ron admitted. It was true that he sometimes fantasized about watching Sandy fuck her mom while he watched or joined in. It was much more rare, but he had on occasion even let himself fantasize about all four of them fucking together. Whenever he let himself think of actually fucking his own mom or of having her suck his hard cock he came very hard, but he still hadn't really let himself have these fantasies very often.
"Me too," Sandy said. "I think I might have an idea to make our fantasies a reality," she said quietly as she began to fondle his cock and balls softly. She paused as she played with his cock and let her fingers run through the wetness her pussy had left behind after their last fuck. "You game?" she asked.
Ron answered yes still not believing what they were talking about doing. It was one thing for him to have fucked both the mother and daughter separately but absolutely something else entirely to talk about them all fucking together. Including his own mother in the mix simply added to the unbelievability of what they were talking about.
Sandy said that she thought it might work best to get them in a different environment to perhaps get them out of their normal roles. She suggested some sort of trip with just the four of them. From there her details got sketchy, but her basic idea was to get the four of them away from home together for several days and then for her and Ron to try and seduce their moms.
They talked about the idea more over the next few weeks and often during her subsequent visits. At first Ron really doubted the idea but it seemed like the more they talked about it and planned it the less absurd it sounded to him. Still, there were times when he couldn't believe what he was planning.
Eventually, he and Sandy decided to propose a summer getaway to their moms. They had ideally wanted to do a surprise trip but neither had the money to make it happen without help. They decided to each pitch in as much as they could and then propose the idea to their moms and ask them to pay for some of it.
The basic plan was that the four of them would spend four days and five nights in this beach town that Sandy and Ron had picked out. It was supposed to have great beaches but they had really picked it for its reputation for wild nightlife. They planned the trip so it would conclude with the July 4th holiday in the expectation that the town would be packed and rocking. The town was close enough that they could drive to it but none of them had ever been there before and it was far enough away from home that they would be strangers to anyone else.
They took the step of reserving a couple of hotel rooms before they even proposed the idea to their moms. Ron planned a visit home on the weekend of mother's day and that is when they sprung the idea on their moms. Over a fancy brunch Sandy and Ron proposed the idea to Pam and Nancy as a sort of family get away.
Much to his relief Pam and Nancy said they thought the idea sounded great. He and Sandy happily filled them in on the rest of the details over brunch and they all left the meal excited about the trip, although Ron suspected his and Sandy's excitement was for a far different reason than Pam or Nancy.
Time seemed to literally fly by until just a few days before the trip. He and Sandy had made more plans and talked often about what would happen. Ron had decided to stay on campus this summer so he worked many long hours and extra shifts after classes ended to get plenty of spending money for the trip.
Ron drove home the day before the trip with his bags packed. The next morning all four of them piled into Pam's SUV and started the three and half hour drive. They chatted excitedly the whole way there and finally pulled up to the hotel in the early afternoon.
They checked into the two rooms and dropped their bags upstairs. They had reserved two adjoining rooms with two beds in each room. Initially Pam and Sandy put their bags in one room while Ron and his mom put their bags in the other. They all four quickly changed into their bathing suits and went out to the beach.
They spent the day relaxing and swimming on the crowded beach. Ron watched with keen interest as his mom and Pam helped each other apply their sunscreen. Each was wearing a conservative two piece suit but he felt his cock grow each time their hands smeared the cream over the other's body.