The spontaneous time it first happened [Short story] [Cuck’s POV] [descriptive] [PART 2]

part 1

It was strange when I took Tim and Jen into the car, not because I was likely about to be cuckolded, but because they seemed fairly reserved on the car journey. I was surprised, but figured either my girlfriend wasn't entirely sure if I was up to this and thus could technically be cheating to her, or simply because they both didn't feel comfortable being affectionate in front of me? Either way it felt hot.
Nevertheless, they were at least talking and giggling behind me in the car journey home, seeing that they were looking into each other's eyes most of the time, whenever the night time street lights shone on them.

When we arrived home, I wanted to make sure they felt comfortable of course, and offered to put on a movie whilst I made some drinks. They vaguely nodded, too engrossed in each other.
Despite sometimes being out of the room to make drinks while the movie was playing though, and purposefully sitting myself on the far side of the sofa, they were still not making any moves other than being very close and whispering to each other. That being said, when I looked closer, I saw Tim had a tight erection, and my girlfriend constantly fidgeted her legs around her crotch. So I knew she was certainly getting wet.
They were desperately waiting to mate, and clearly I was in the way

I stopped the movie "ok Tim, I'm off to bed now. Jen we can watch the rest of the movie tomorrow, is that fine?"
"hmm?" Jen turned to me out of being distracted with Tim "oh yeah, that's fine. Night Andrew!"
"Night Andrew" Tim also added

Purposefully I went into the one bed guest bedroom. Now hearing their conversation in the quiet room, they seemed much more raucous and cheeky with eachother, now that I wasn't in the room. I started getting hornier though, when I heard in their now increasingly lowering voices their flirtations and giggles between eachother.
"Wow, I never knew you you had abs to grind on Tim!"
"All the more reason for them to feel your breasts, when I'm close with a pretty girl like you Jen"

This continued on for a bit, as their voices became a whisper. Other than that, occasionally hearing a little laugh from Jen.
Then the room went silent. My heart was pounding, my erection started to hurt knowing what was likely happening in the other room.
Faint shuffling sounds on the sofa and with clothes, before I heard the first sweet sound of lips smacking. With the guest room being so close to the lounge, and the way the house was set up, I could hear crystal clearly the sounds of their deep sometimes wet kissing, and their tongues caressing. The cherry on top was sometimes hearing my girlfriend's cute little short moans, as another smacking sound muted her. I felt like my cock was a hair trigger at this point, and felt so hot that this was finally happening.

Eventually I heard them get off the sofa, and glimpse in the crack of the door my girlfriend lead Tim into the main bedroom.

Once again, silence for a bit, other than the sounds of them getting into bed and shifting around. Then the first long guttural moan from my girlfriend, followed by smaller rhythmical moans, the occasional moan from Tim, and the bed starting to rock.
What was interesting is that Jen moaned differently with this guy than she ever did with me.

Carefully opening the outside door to my room, I sneaked over to peak around into their room, and I saw their silhouettes almost entirely glued together, with no 'crack' between either of their bodies. They were almost connected like perfectly fitting jigsaw pieces, almost like they were meant to be.
I saw their mouths open a lot of the time, in pure moaning bliss, as they gently rutted each other. Through the much thinner window, I could even hear Tim's cock move in and out of Jen's sloppy pussy. When they finally finished, I vaguely saw Tim's cum coming out of my girl's soaking pussy. Out of breath they eventually looked at each other, giggled a bit, before planting eachother's faces together again under the covers.
Their love making continued throughout the night, as I tried to cum in unison to their climaxes.