Cums in your ass!

The final few thrusts are especially powerful, as Alexandra attempts to go as deep in your ass as she can, to deposit her seed. As the final thrust plunges her massive cock balls deep in your ass, a loud yell can be heard all throughout the lab. Alexandra screams out in pleasure. You feel her cock twitch and tense up, as she unloads her piping hot cum straight in your asshole. There is a flurry of feelings and sensations overtaking you right now. You feel the size of Alexandra's dick stretching the limits of your ass, the pressure on your prostate and the warmth of her seed, all while watching Alexandra's face locked in an expression of ecstasy.

Her first load is gigantic. It shoots out with great ****, filling every part your ass, not yet hugging Alexandra's shaft, completely. It coats you entirely white from the inside, as you feel it's thick texture spread across every part of you. Since you are generally upside down, all the sperm flows down to the deepest parts of your ass, making room for another load.

Alexandra quickly releases an even bigger cumshot, grunting as she does. The second stream of jizz joins the first one. You watch as your stomach inflates from the volume of cum being shot in it. With another grunt and a small thrust, another large load gets stuffed down your ass, bulging your stomach as if you were pregnant. You watch as your stomach keeps expanding to make room for more and more cum. After her second load has subsided, you already feel stuffed with cum, but Alexandra isn't done yet...

Many more loads follow the first two, stuffing your ass beyond your own knowledge of its limits. After your ass physically can't contain any more of Alexandra's spunk, it starts flowing out, sliding across your body, down your impressive stomach bulge, your chest, and your face, forming a puddle on the ground. After a flurry of over a dozen loads has entered your body, Alexandra's orgasm seems to be over. Her breathing has calmed down and you don't feel any more sperm flowing from her dick. She slowly starts pulling her giant shaft out of your ass. All the cum that is covering it makes this pretty easy, but the sensation of her cock sliding out is still arousing. As her head finally pops out of your ass, still dripping sperm, you feel a huge relief, as your innards make their way back to their respective locations. As she brushes against your prostate one final time, it's enough to push you over the edge of orgasm. You spray a respectively tiny load all over yourself.

Alexandra speaks up "Phew... I think I'm all pumped dry. Sex felt SOOO good! I can't wait to try out what I learned here on the other models. I'll try to fill them up even more than you! Although, that might be kind of hard, since I was saving this load for a whole week, just for you! Umm... do you need any help getting up?"

You say, in a tired voice "No, I just... need a minute."

You slump down on the floor and put your hand on your stomach, feeling Alexandra's hot jizz inside of you. As you slightly press on it, a stream of semen starts flowing out of your wide open asshole. After a while of emptying Alexandra's load from the confines of your rectum, you finally stand up. You find this very difficult, as your anus is stretched beyond belief. You'd take a seat on the couch, but it's flipped over, so that's kind of not an option now.

Alexandra notices this and quickly takes action. "Here, let me help you out. It's the least I can do after having my way with you."

She props up the couch with her massive strength. Then, she carefully picks you up with her hands and places you on the couch. She sits next to you, pushing the cushions down, making you lean in close together. You can smell the odor of cum from her soft dick, but you turn your head upward to look at her face. She looks back down at you, smiling.

Then, Alan's voice comes up through the speakers. "Hi, you two! Seems like everybody's getting along just fine. How are you feeling, Alexandra?"

She replies "Doing great mister! This guy here has been an amazing fuck buddy! I can't thank both of you enough for setting up this experience!"

Alexandra goes to hug you, wrapping her arms around you and mashing your face in her giant tits.

Alan continues: "Well that's great! You can go ahead and head back to your room when you're ready. And you, Jason, can try making your way back to your own room. I get that that can be a bit hard, but testing never ends here, so get ready and let's keep working!"

Alexandra lets go of you and stands up. You watch as her giant body moves around the couch and crawls back through the door she came from. You take a minute to give your ass some rest and make your way back to your room as well, jumping in bed immediately.

You got the "Good impression" ending with Alexandra.