On the morning of our last day together, my sister and I woke up in each other's arms.
The incredible experience of the night before left us exhausted and neither of us had moved all night. Amy must have been awake for a while before me. The moment I opened my eyes, she greeted me with a "good morning sleepy head," followed by a sweet warm French kiss that made me tingle right down to my toes. We were both toasty warm under the sheets.
She crawled over top of me and rubbed her nipples on my chest. She looked so beautiful in the morning sun as I stared up at her. She kissed my mouth again and said, "It's only 7:00 so we have some time if you want to play."
She then kissed my neck and down my chest. She paused to lick one of my nipples and I moaned in pleasure. "Somebody likes his nipples touched," she said, as she kept licking it.
I had already woken up with a raging "morning wood" hardon and her attentions to my nipples made it throb. She squeezed herself into the gap between my arm and body and cuddled in as she continued sucking my nipple. Her hand exploring my stomach and occasionally venturing down further.
I reached down and started running my hand over the shaft of my cock and felt the wetness of precum on my stomach already. When she saw my hand moving under the sheets, she pulled them off to watch what I was doing.
"Let me see you stroke it," she said, as she moved my hand so it wrapped around the shaft.
I began gently stroking my cock for her and she seemed to love watching me. I'd circle my head and go down the shaft, sometimes stopping to squeeze my balls.
"Is that how you do it when you're alone in your bedroom?" She asked.
"This is how it starts, I told her but it feels better with lube so I can squeeze it and make it all slippery, like it feels when it's inside you," I replied.
"What do you use for lube?" she asked, fascinated by the spectacle of watching me masturbate.
"I've used spit, hand cream, coconut oil, or even shortening, as long as it's good and slippery, it feels good," I told her.
"Have you ever used some of my hand cream?" she asked as she took my whole nipple in her mouth.
"Yes," I moaned back, hoping she wouldn't be mad at me.
"You are a very bad boy," she whispered sensually.
"Have you ever thought about me when you're touching yourself?" she asked, her arousal with every question was increasing.
"Yes, I have," I replied.
"When was the last time?" she asked, as she gently rubbed my balls and gently bit my nipple.
I knew exactly how long ago I had jerked off while thinking about her but I never thought I would be telling anyone about it, especially her.
"It was last Saturday when mom and dad went to the mall and left us alone at the house." I told her.
"Did you do it in your room?" she asked.
"No," I replied.
She started using her hand to tease my other nipple. My balls were begging for her to touch them again.
"Where were you, you naughty boy?" she asked with a giggle.
"I was in your room," I told her.
"That's scandalous, were you using my hand cream?" she asked and started to bite my nipple harder.
"No," I replied.
She leaned down and let a huge ball of spit fall out of her mouth onto my cock and hand. It felt so good to stroke myself with it."
"Did you use spit then?" then she asked playfully.
"No," I told her "I was using your red satin panties."
"You like stroking your cock with my panties, do you?" She said. It sounded so erotic to hear her talking like that.
No wonder they were stained, it wasn't the washing machine, you are a very dirty boy," she said.
She moved up the bed and put one of her nipples in my mouth, while she teased and pinched mine with her fingers. I could feel how hard her nipple was with my tongue.
"What were you thinking about when you were fucking my underwear?" she asked, letting me enjoy her nipple a bit before answering her.
"You in your skimpy blue bikini," I told her.
"What was I doing in my skimpy blue bikini," she whispered.
"I was watching you sunbathe from your bedroom window that day," I told her. Just saying it out loud made me harder and brought me closer to orgasm.
She leaned in close as I stroked myself harder. "What did you fantasize about doing to me while I was sunbathing Kevin?" she whispered so sensually there was no way for me to resist any further.
"I wanted to Fuck you." I moaned as my cock exploded spraying cum all over my stomach. I stroked harder and rope after rope of cum sprayed on the sheets and on Amy's legs. I milked every drop out of me as she watched. I never thought I'd jerk off in front of anyone, but Amy just made it so sensual I couldn't resist.
She kissed me again, long, and hard. "Now that's how you have a good morning baby," she said.
"God that was good," I told her breathlessly, "anything you want me to do for you?"
She smiled and said, "you already did it."
I got out of bed and headed for the shower. I was a mess, but I felt great. When I got back, I found Amy with her legs wide open on the bed, knees up, examining her pussy with one of the small mirrors from her purse.
"Everything ok?" I asked.
"Yes, I just wanted to see how red and sore it was, it felt a bit tender the more aroused I got watching you," she told me.