Quality over quantity

Amelia still seems dreamy when you ask her how she's doing. "Hey, are you alright? You're acting very.. strangely right now." you say. Amelia shakes her head. "I'm sorry. It's just.. - It's hard to believe my little brother is going to be the saviour of the human race. You have a beautiful cock, you know that?" she suddenly blurts out. "Uhm.. thank you. I hadn't noticed, but I believe you." you say timidly.

"I'm sorry John. I should probably go. Before I do any more stupid things." she says. She gets up from the bed and heads towards the door. "Wait! Don't leave. I don't care if you say anything stupid, just don't leave me alone now that we're finally back together, sis." you say. Amelia stops dead in her tracks. "I... I'm sorry John. I will be back soon." And with that she leaves the room.

Vanessa returns almost an hour later. With her face still red from what you can only assume was a pretty intense meeting she and Dr. Carrol just had. "Where's Amelia?" she asks. You shrug. "Don't know. She ran off after blurting out how much she loved the sight of my cock. Said she didn't want to do anything stupid or something." you tell her. Vanessa smiles. "That means I get to finish my lesson!" she says excitedly.

She rips off her nurse outfit and quickly climbs on top of the bed. You stop her however when you spot cum still leaking out of her pussy. "Oh, really? You should get used to it because it will be a common sight once you get out into the open world. But I can skip this class and head straight into forbidden acts!" she says. "You see, with semen being so rare, it is pretty widely accepted that it should all be put to good use. This means oral and anal sex are both usually frowned upon. They are seen as selfish acts. But you and your endless supply of beautiful hot and sticky baby batter don't care about those stupid rules!

"Let's start with getting you all lubed up. It's going to be tight I'm pretty sure." she says as she lowers her head and kisses the head of your dick. She then takes it fully into her mouth and start lubing it up with her tongue and throat. She's done it many times before for you, but it's still just as pleasurable every time. You feel your balls already twitch in anticipation of the release you'll surely get any moment now, but Vanessa pulls away instead. "Not yet big boy." she says with a giggle, "I have some other plans for this session."

"Now, for this it is easiest if I position myself... " Vanessa has turned around so that her ass is now pointing towards you and has bent forward, resting on her arms."Aaah, just like that. Now! You get behind me, probably on your knees, and grab my hip bones. You then insert that beauty into the other hole. The one that hasn't been abused a bajillion times before." she says, cheerfully as always.

You get up on your knees as instructed and point your dick towards a small hole just above the one Vanessa keeps stroking and inserting fingers into. You push a bit and feel how much resistance it is giving. "Don't be afraid to push with a lot more ****. I'm a tough girl after all. The key to proper insertion is your grip on my ass. Good luck!" she says. You place your hands on her hips and find some flesh to hold on to. You then start forcing your massive erection into Vanessa's ass.

At some point you think you will never be able to penetrate the seemingly impenetrable barrier to Vanessa's insides, but you soon start feeling the fleshy gate starting to give way. You increase your **** on her backside, spurred on by Vanessa's constant encouragement and moans, until finally you conquer the nurse's tight ass and shove yourself half way inside of her.

"Ooooh my god. You feel even larger than before like this." Vanessa says from between gritted teeth. You push your dick as far into the slutty nurse's ass as possible. You then start pulling back out before pushing back in. Slowly at first, but you quickly get into a rhythm and you increase the pace. You can feel your balls twitch and churn and Vanessa feels it too.