Mark and Julie are excited.

The drive home was uncomfortable. My top was glued to my father’s cum, leaving it crusty and pulling against my flesh. I had at least managed to clean my eye, which, although I could now open it, had white chunks stuck in my eyelashes.

I got a funny look from one of my neighbours as I walked up to my door and unlocked it. I stepped inside and heard hurried footsteps, suddenly Julie was there, completely naked, her dark skin shining with baby oil. She always looked great straight out of the shower.

She slid to a halt on the wood floors beaming with a stupid grin, then stopped and started to laugh. “Your dad left you with a little present, I see.”

I closed the door, and Mark joined moments later. He was dressed for work and smiled in my direction. “You are going to have to give us all the details. Coffee?” he added.

I nodded and linked my arms with Julie as we walked into the kitchen. Mark started to make coffee as Julie excitedly grabbed my top and pulled it over my head. The pink t-shirt left some fluff stuck to the cum on my left tit. “Wow, your dad sure does cum a lot.”

I laughed, “That was this morning after he had cum twice the night before and once that morning. You should see how much he cums in his first load.” She immediately looked interested. “Actually, Mum suggested we shift family night to Friday next week, and Julie comes along. She will show us all the tricks to get him to cum a lot. She reckons Dad can fill a drinking glass.”

Julie jumped for joy, “I would love to see that, and I do owe your father, don’t I?” she said.

Mark laughed before I said, “Well, mum thinks he cums so much that no one woman can drink his entire load. I told her you might like that challenge.”

“Oh?” Julie asked. “If I can’t, I’m guessing your dad gets to fuck me, but what do I get if I succeed?”

I smiled as Mark handed me my coffee, “If you fail, he fucks you bareback while you are fertile.” Julie moaned at the suggestion. “If you succeed, then he fucks you on your terms, as often as you like for a month.”

Julie pouted, “Doesn’t sound like much of a deal to me.”

I smiled, “He’s almost a foot long and about eight around.”

Both Julie and Mark looked at me, “For real?” Julie asked. I nodded. “And I take it the only way I’m going to feel that monster in my cunt is if I agree?” I nodded again. “I have a few extra conditions.”

“I’m listening,” I said, taking a sip of coffee. I knew I had her hooked.

“I win, and he has to wear that electric cock ring you guys have.”

I frowned, “The Bluetooth tens one which zaps its wearer?” she nodded. “So he wears that while fucking you?”

She smiled, “Nope, he wears it the whole month, recharging it every night, so I can spend the day zapping him until I can fuck him again.” I laughed. “And if he wins, I will do the same with the electronic dog training collar.” I moaned. “I will let him treat me like a bitch, zapping me as much as he likes in the lead up to him getting to fuck me bare.”

“I will let him know,” I told her.

She held up a hand. “And, until I lose, you have to wear the collar, and your dad, Mark and I will have control, so we will all be zapping you and treating you like our bitch.”

I smiled, “Anything else?” I asked her.

She nodded, “No, I think that covers it. I agree you put the collar on today, and we will drive you mad with list zapping you the whole next week.”

I grabbed my phone and sent a message to dad with the terms. It didn’t take long for him to reply. “He agrees, so gets the collar and let’s start this. I will talk dad through downloading the app.”

Julie jumped for joy, “I’m going to have so much fun the next week, and you know I’m going to win this challenge.”

I smiled, “I don’t think you understand how much of my father’s cum you are going to have to chug,” I told her.