Although the chance for being pleasured by all these girls around you is a very tempting one, you are concerned about your girlfriend, now snugly trapped inside her allegedly ex-enemy's womb, although you are not entirely too trusting of Monica, any explanation will be better than none.
"I'm sorry, but I'd rather hear the story right now." You politely say, not trying to disappoint the girls too much. Monica sighs, and steps toward the door.
"I'll explain, but let's let the girls have their fun while we talk." She says, stepping outside. You follow her to the living room, and with a grunt she plops down on to the sofa, relieving her legs of both her and Amy's weight.
"How are you able to do this?" You ask. "And didn't you two hate each others' guts before?" You ask.
"Well, it happened last week." Monica says, as you listen, you can notice Amy shifting around inside her. "It was a lonely night, so naturally I... well... pleasured myself, I wasn't satisfied with fingering myself, as I usually was, so I started looking for things I could use as a dildo. I started with a few things around my house, but nothing really felt too great, and things started going on, trying to find larger, harder things to fuck myself with, and things went in a blur until I realized I was shoving a watermelon up my cunt." She pauses.
"Go on." You say.
"It took a moment for me to realize what I could do, and the day after I explained what I did, being a bunch of sluts, myself included, they were interested, but Amy overheard us. And after I went home, she followed me, Imagine my surprise, and anger when I opened the door when she knocked. But I grew interested as she explained she had this fantasy fetish or something, Unbirthing she called it, and she wanted me to make it reality for her, up until then, the possibility of taking an entire person in didn't cross my mind, and even though we used to hate each other, we both had the desire, and well, kissed and made up, literally, she spent most of the day after that happily curled up in my womb."
"And now this orgy? At my house?" You ask.
"Well, Amy wants you to be involved too, she felt bad that she and I have been lovers of sorts without you, so she wanted to break the news to you in a big way." She explains.
Well, her story believable to you, especially after you just saw Amy being sucked into her, plus Amy was seeing you a lot less throughout the week, and what little you saw of her, she seemed especially happy, you suspected she was cheating on you a little, and although it was technically true, you approve that it's with another girl, who could fulfill a previously impossible fantasy, and is willing to let you into the relationship too, who the hell are you kidding? This is the best thing that's happened to you in years!
"So, that's the story." Monica says. "I'm tired of talking now, how about we get to know each other better, Jim, I always somewhat envied Amy for having you, but now she's willing to share." She says, leaning back and spreading her legs. "Enough delays, let's get started!"