Our mother and father didn't leave their room the next day. We didn't knock, and Nell and I made sure the other didn't eavesdrop. At one point, Mom told us to set a gallon jug of filtered water just inside the door. No peeking.
"What the fuck happened yesterday, between you and Mom - before I got home?" Nell acted the opposite of submissive that day. She demanded.
"What the fuck happened between you and me, yesterday morning?" I redirected. I seriously wanted to know. If I hadn't, she would have dogged me for the rest of the day to answer her question. "Don't tell me that your moping all day wasn't because you sucked down a wad of my juice without a 'Hello Bro.' or 'Howdy do.'"
That pushed a button I hadn't expected. My big sister shrieked. "I DON'T KNOW!" Before explaining, she hustled me out into the backyard. Our parent's room was on the front side of the house. "Craig, I'm not blaming you. I fucked up. I had to deal with it."
My normal sized balls were big enough to man up. "You're wrong, Nelda." It was an opener that I kept in reserve for times when I was absolutely certain. "It takes two for a dick to get sucked. I wasn't a passive observer. I have feelings too. You fucked up with me, and I won't allow you to let me off scott-free. What was going through your filthy mind, yesterday morning?"
Nell took me seriously, but she needed to think. "I'm sorry. I wish I could explain it as easily as I can explain spreadsheet macros. -- I never felt that way before."
"What way?"
She frowned with supreme intensity. "Hunger."
I had pushed enough. I gave her time - even took a step back."
"I know lust, intimately and unabashedly. This was different, powerful, like an ocean of desire drowning me. I thought I knew what my fetish for big dicks was capable of. I was fucking ignorant! Craig, your cock is big, but compared to dicks in the pornoverse, it's just an appetizer. The reality of it, however, scrambled my reason."
Her eyes glazed over yet somehow stared deeper into me. "I wanted to be your fuck slave, yesterday morning. I wanted to quit school and take your prick in all of my holes for the rest of my life."
"I thought you were making yourself bored of it?" I shouldn't have asked. I was pretty sure of the truth.
"Hah! That's how stupid I was. Craig, I had my best finger drilling ever after watching you masturbating for an hour. My need to get pile-driven by that thing is getting worse.
"Then we stop. I'll stop goading you." I was genuinely concerned for my big sister and awfully guilty for parading my cock bulge.
"You'd have to enter a monastery and I a nunnery." Nell put a soft hand on my left shoulder. "We have to face this. While we're living together, I'm going to do whatever you want, to get some from your dick." She backpedaled. "Not all the time. Hopefully not often. I'm good today, and probably for until Dad returns to work next week. I make no promises afterwards."
I thank the gods my dick didn't get hard right then. I imagined jerking off in my room, later that day, until my dick fell off.
"Now tell me, what the fuck is going on between you and Mom?"
"I'm going to fuck him." Mother had been standing at the back door, drawn out of her room by our earlier outburst, wearing her house robe.
Nell's shields flared. "You can't do that to Dad!" She stepped around me. "Fuck anyone else - not Craig. I won't care. And if you think I'm jealous you're not half the women I respect."
"Where is Dad?" I attempted to reduce the tension.
"He sleeping - tuckered out. I've never had so many orgasms," Mom was serious, "Except for yesterday afternoon."
Nell balled up her fists and hammered one against my shoulder. "You fucking asshole!" The next one punched my ribs. "FUCK!"
"STOP IT, Nell!" Mom started towards us. "You're embarrassing yourself."
I staggered away from my sister and my incoming mom. "I deserve that." I didn't mean I wanted more blows.
Nell's fists fell to her sides and shook. Her anger redirected again. "What you told Father, you were talking about Craig!" She accused Mom.
"There was a reason I confessed with you two present." Mom caught up to Nell and grabbed her left elbow. "What's happening between the three of us, had to come to the surface!"
Mom gutted her daughter then. "Don't tell me the reason you were down all yesterday had nothing to do with our nasty situation."
"You didn't eavesdrop long enough, apparently." Nell spat.
"Let me talk." I asserted. "This isn't all my fault, but I was actively playing you two. Now I wish I hadn't. We wouldn't be nearly as fucked as we seem to be. Hit me. Ground me. Cast me to the wolves. I was more than stupid to jerk your fetish chains."
They laughed. It wasn't a TV laugh that suddenly turns a conflict into an agreement. No. My mother and sister burst into hilarity because of how ridiculous I had made myself.
Nell humbled me. "Ooo, me get so horny when you have big bulge in pants!"
Mother mocked me. "Do you need another tube of antibiotic ointment? Don't you know how useless that is against a fungal infection?"
Nell considered our mother. "I didn't catch that trick." She shook her head, disappointed even further by me.
I was use to their snark, but pride folded inside of me like a crushed soda can. My ability to snark back fled as double crosshairs settled on my groin.
"Hmph." Mom considered her words. "Craig, the reason Nell and I pretended was, we couldn't admit to how much we wanted to access your dick!"
"Damn, Mom, spot on!" Nell openly admired her for half a second. "That doesn't give you the right to fuck around on Dad with your gods damned son!"
"Gods, I hope you never push a baby out of your cunt."
The two only managed to agree to catch their breaths.
I wish I could have left them arguing - like I had a few days prior. Mom was right. We had to hash this mess out. "Someone, tell me what to do." I threw up my hands. "I don't want to cause Dad grief, but Nell, he did say Mom had freedom to do what she wants."