Reject their proposition

"No... No! I can't!"

Sarah lowered her hand when she realized I wasn't going to hold it. She didn't stop moaning, though. Zoe even chuckled a bit.

"You reject us? Even when you're getting so hard?"

"Shut up, Zoe!" I hastily picked up some of my clothes. She looked so smug, but I won't deny she looked hot pounding on my fiance so hard. "Sarah... I wanted to spend my life with you... Are leaving all that behind?"

However, Sarah started screaming. Her body trembled and her back arched: she was cumming, and she was cumming hard! And that told me everything I needed to know: Sarah didn't care about our relationship, only about Zoe.

I walked towards the door, but Zoe called me before I opened the door.

"Liam! Wait, there's something important you need to see!" Zoe said, raising her voice just a little. I turned around. I could see them from behind Zoe: her back was pretty, her ass was huge, and her hips were so wide. Her thighs were so juicy, and every curve of her body jiggled hard with every powerful thrusts she gave into my fi... Into Sarah. I heard Zoe groan and moan almost sweetly, and then thrust even harder.

"What?" I asked, as if I expected some crucial information that'd suddenly make my life less miserable, but Zoe kept moaning for a little longer. Then I looked between her legs, and I saw the thickest rope of semen leaking from Sarah's pussy. Zoe pulled out, and a cascade of white slime started flowing out. It was an incredibly large amount of semen!

"You see this?" Zoe said with a smirk "I have been shooting this inside —and on— Sarah for a long time. She loves it. That's it. That's what I wanted you to see. You can leave now, I'll keep on making your girlfriend happy. Well, your ex-fiance, I guess? It is my ring in the end. What do you say, baby? Wanna marry me so I can fuck you endlessly?"

Zoe put her cock, far from soft, back into Sarah's pussy.

"Oh, yes, pleeeaaase!!" She moaned.

Then I left the room. I got dressed while the rhythmic pounding I had believed was a massage continued in our bed. Then I left the apartment.