Cassie announced she was going to bed early. I went upstairs to my room to 'read' but really I just lay there with my head spinning, and my cock trying to get my attention.
Cassie came in, wearing summer pyjamas - cotton shorts and a cotton button-up short-sleeved top. She sat on the side of my bed with one leg under herself, I was under a single sheet in just cotton shorts. We weren't concerned about her being heard or even seen in here, it wasn't unusual, and dad was crashing about in the garage while mum's sewing machine hummed downstairs.
"OK Mikey-boy. Come closer." I did, and she whispered: My cock rose as she spoke. "I can't tell you how horny I was when I peed on you. With you almost in me... oh god Mikey. I even enjoyed it when you showered me back. A 'golden shower' isn't it?"
"Yeah, that's it. I could feel your pussy heat through my shorts, and then when you let go, well. Hot wetness out of you and cold wetness out of the clouds. Surreal!"
"Yeah. Same for me. My whole front was warm-washed then instantly cooled by the rain, then warmed again. Shit Mikey, I love exploring stuff with you."
I gulped. My cock twitched and she saw it.
"Oooh, Mikey," she teased, "Does that mean 'me too?'"
She laughed out loud, patted my cock, then let her hand linger there. Cassie looked behind her to make sure the door was closed even though the noises told us we would not be taken by surprise. She pulled the sheet off, and put her hand up my shorts leg to grasp my enraged dick. I took her hand out of there, but when she cocked her head 'why?' I answered by pulling my shorts right off. She smiled, and went back to work with her hand. With her other one she touched herself between the legs and immediately the thin cotton showed dampness.
Cassie scooted over, and popped my rigid dick into her mouth. I gasped. She took it out, put a finger over her lips to 'ssshhh' me, then licked my shaft and encased my cock in her mouth again.
She learned to grasp on the out stroke and release a little tension on the down stroke, and it sent me wild. My thighs were jerking within seconds and I grabbed her head, pushing my hips up. Her mouth on my cock was electric wetness. Heat and lust. I lasted about two minutes. So lost in a fog of lust was I that I didn't even give her the chance to choose, I just pushed, grunted, and blew my load in her mouth, five, maybe six strong jets followed by little twitches.
I collapsed back onto the bed. Cassie's mouth let my cock go and I watched as she slurped, swallowing my jizz, wiping her lips and chin with her fingers. I looked into her eyes apologetically but I needn't have worried. She whispered through wet lips: "Jesus bro! What a load! I nearly drowned!"
I was silent, basking in spent sexual tension, gazing with awe at the sexiest creature imaginable. And she was my own little sister.
She smiled, straightened up, and put the sheet back over me. This time I sat up against the backboard and she sat facing me with her legs crossed. Her shorts were loose around her legs and I could see one side of her pussy. She pulled the cloth over so I could see it all. I'd just spent my erotic energy and yet
still
I desired her, to do things with her.