Carol’s fingers diddled her clit as I fucked her tight ass. I was shocked when I felt Bill caressing my balls, but it didn’t deter me. If anything, the feeling of his hand on my nuts added to the experience.
I don’t know how long I fucked Carol’s anus before she started to shake. She shouted out, announcing her climax. The combination of her gripping rectum, and Bill’s fingers playing with my balls, sent me over the edge. I slammed into my sister’s ass, holding her by the hips as I came.
When my cock stopped pulsing, I relaxed against Carol’s back. Bill gently rubbed my balls and then removed his hand. I sat up, let out a sigh, and removed my spent cock from my sister’s rectum.
“That was amazing,” Carol said. She got out of bed and headed toward the bathroom.
Bill and I followed my sister into the bathroom. We all got into the shower to clean up after a wild couple of hours of heated sex. While we washed one another, I started grinning.
“Thanks for the assist, Bill,” I said.
“What assist?” Carol asked.
“I played with your brother’s nuts while he fucked your ass,” Bill said.
Giggling, Carol said, “Tell me next time. I would have loved watching you, sweetie.” She turned to me. “Did it bother you, Matt?”
“Not at all. Who knows, maybe next time I’ll return the favor,” I said with a grin.
We finished in the bathroom, changed the sheets, and climbed into bed together. Carol gave me a kiss, pushing her tongue into my mouth. When she stopped, she said, “Good night, Matt. I hope you’re enjoying your stay.”
“Goodnight, Carol, I’m having a great time,” I kissed her again, and then she rolled onto her side, facing Bill.
Lying on my back, I listened to my sister and Bill telling each other how much they loved one another and how glad they were to share with me. They spoke loud enough for me to hear every word.
Reaching behind her, Carol put her hand on me and said, “Spoon with us, Matt.”
I rolled against my sister’s back, put my arm over her, and wiggled. She put my hand on one of her breasts, pressing it against her firm mound. We all repeated goodnight, and I started falling asleep.
The next few days were filled with swimming, sunning, and sex. Bill worked a few hours a day, and I attended my online classes. Carol made her self busy, making sure her husband and I didn’t get horny.
Things were going great, and then Bill received a phone call.