You might want to read the first part if you haven't. http//www.literotica.com/s/fall-folly
If not I think they stand alone. Yes all are over 18 they always are in my stories.
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Melani felt sick to her stomach and revulsion at herself instead of the afterglow of a good orgasm. She had just masturbated to her nude son while he masturbated under the outdoor shower. Her shame quickly turned to anger at him for being that perverse to jack off in a public place. She wanted to go tell him off and tell him how terrible it was but she couldn't without telling him she was watching him. She was angry at him, angry at herself for watching him and touching herself, even though she didn't know it was him until it was all over. Melani was flushed bright red from head to toe, not in orgasmic bliss this time but in rage and confusion. Even in all her denials when she saw her sons face she felt another and maybe the best jolt of joy and she wasn't even touching herself there. Still nude Melani felt chilled to the bone and now nauseous again. Running from the room to her bathroom she nearly tripped on her robe laying on the floor and forgot to close the door completely as she raced out to find the toilet in her bedroom so she could be sick.
Melani had missed the tail end of the mud caked boys conversation where Blake told Robert that he was kinda nervous about taking a shower outside and Robert let him use the shower in the mudroom while he took the pool shower. Robert knew it was private, well except for the view from the guest room but nobody was ever in there.
Robert stepped under the water and stripped off his shorts at the same time. He was glad this was Florida and he could do this most of the year. If he could get away with it he would shower out here all the time, he liked the way if felt to be outside naked. He began remembering last June when he and his Dad had put the shower in. His Mom had wanted the shower in pool house but his Dad didn't want to break up the concrete floor to put in a drain and increase the cost. The hard part was the trenching for the water lines. His Dad was cheap and didn't want to rent an excavator to cut the trench so Robert Spent all Day Saturday digging from the garage and running the water lines to the shower. Hot on one side of the trench and the cold on the other. Fortunately his dad used PVC flexible pipe so that had all that done in one day. Sunday they built the shower frame,installed the drain, and put the privacy wall along the pool house wall. A weather front moved in that afternoon making finally connecting the shower impossible in the frequent thunderstorms. So Monday morning he was outside finishing the shower for his Dad.