A Little Sister’s Yearning, Pt. 1

*fap fap fap*
“Arrghhhhhh.” I sucked my gut in, knowing my cock was about to erupt.
*fap fap fap* I jerked my cock into my mother’s panties. She was downstairs cooking dinner, which meant I could spend a couple minutes in her bedroom. “Oohhhh, mooooom,” I groaned softly. “Ughhhhh… ughh, yeah,” I was a thought away from shooting my whole load into her used red panties. “Faaaark yeeeaaaah,” I gritted my teeth. My cock exploded – and in that millisecond;

“OH MY GOD!”
“Shit!” I quipped, springing to my feet, my younger sister Elly standing at the door.
“That gross, Eric!” Elly scowled.
“Get out! What are you doing in here? Get out!” I demanded.
“I’m telling mom,” she said, and I reacted.
“NO, WAIT. Don’t!” I could see her shadow in the door frame. She’d stopped. And the next second she was back at that doorway.

“I know what you did, Eric. I’m not stupid.”
‘–Anymore,’ I felt like adding, but didn’t at risk of her racing down them steps to mom.
“You’re sick.”

I had to say something. I had to defend myself – somehow – or she was going to be a little bitch about it and scream to the high hills about this whole thing.
“You do it too. You play with yourself too,” I softened the terminology for her to understand.
“No… no I don’t.” Elly lied. It was all over her face.
“Everyone does, Elly,” I reasoned.
“I don’t,” she folded her arms, staying true. I knew for a fact she was lying, though. Me and mom rotate doing the washing around the house, and there’s not a time goes by that at least one of Elly’s undies is wet or stained with cum and pungent of it. “And you shouldn’t be doing that to mom’s stuff. That’s like incest.”

Intrigue struck me. “Incest”. She knew that word. Elly was only ten years old and she could use it logically like that. Something was awry.
“Where did you hear that word, Elly?”
“What word?”
“Incest. How do you know what it means?”
“I don’t know… I read about it.”
“You read about it?