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Chapter 4
What do you say? (honestly, what would you say)
"Explain this to me one more time."
You can't help it. You can't just flip on some naughty switch in your head and go with it. You have to make sure this is real and this is okay. You feel your body tremble with anticipation and anxiety. There's no denying that what's potentially about to happen is very wrong.
"Explain what exactly?" Katie asks.
"You're both... I mean... you're both cool with this?" You just need to make double, triple, sure.
The sisters laugh. "You're not pressuring us. In fact, I think the opposite might be true." Tess says.
Katie tries to explain, "Look, I went to Tess with this idea months ago. And she said yes..."
"Almost immediately." Tess finishes the sentence. "I thought it was a great idea."
Katie smiles at her sister, her fingers caressing he shoulder again, then working their way to her neck, then slowly downward until her hands are cupping one of Tess's breasts. Tess bites her lips and hisses when it happens.
You're not sure when you might be able to believe that this is really happening.
"Tonight is for tonight. And it's for the three of us." Katie says. "I don't think anyone's going to end up going to jail because of what happens tonight. So enjoy it. If you want to, you know, jerk off while you watch, you may."
Tess doesn't object to this offer. And neither do you. Although you have to note, "Okay but then Greenie would see..."
"Your penis?" Tess finishes your sentence, glancing down at your bulging crotch. "I've seen penises before."
She has a point. But this isn't just anyone. It's your girlfriend's sister. "Yeah, but it's not the same." you say, not even sure why you're protesting. It's all too much to process.
"Okay, then let's just get this out of the way to start with." Tess says with total confidence.
Get what out of the way?
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Happy Birthday Threesome
Your girlfriend throws the best birthday party ever
Your girlfriend has a surprise for you on your birthday
Updated on Jan 23, 2026
by Bobrt
Created on Jul 7, 2013
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