Imagine you're a prince. You are sneaking out to see your stable boy, horny as hell and needing to get his dick in your boycunt. You've been seeing him for just over a year after being thrown from your horse and requiring him to carry you back to the castle. He fucks you hard into his rough bed, panting and grunting.
"Gonna fill you up, your highness," he whispers into your ear. "What will the kingdom do when they find out their precious prince is such as slut for my cock." You're barely coherent at this point, only managing to drool and moan into the bed. Not even thinking about the consequences as you feel him cum deep into your cunt.
Twelve weeks later, sees you cupping the barely present bump of the baby in your womb. You go to your stable boy in a panic. But, as soon as you tell him, you find yourself pinned to the bed being fucked with him running his hands all over your distended belly.
Your belly continues to swell as the pregnancy progresses; at three months in, you're called into the King's room, and he decrees, you must find yourself a spouse to help provide the kingdom with heirs. You run crying to your stable boy; he pets your hair and fucks you gently. He can't stop himself from gently rubbing your swollen belly. He pinches your nipples, they're still sore from rubbing against your tunic, and you whine softly.
"Can't wait till these fill up too," he says, massaging your tits. He continues to slowly drag his cock in and out of your cunt, holding tightly to your hips as he rocks into you.
The King enters the throne room and announces that he will use a ball to find you a spouse. The kingdom sends out invitations, and people are arriving within the month. You greet every one of them as each kingdom, dukedom, and everything in between introduces their progeny. Unfortunately, none of the potential spouses catches your eye, and you find yourself daydreaming of your stable boy feeling his cum dribbling out of your pussy from your earlier encounter.
The week of the ball arrives, and your clothes, which were custom ordered two weeks ago, no longer fit. The suit is tight against your stomach, and your tailor sighs as he prepares to let it out again. You feel your cheeks heat up and look away. It was getting harder and harder to pass off this pregnancy as weight gain. Your pussy is dripping in your pants as your hormones drive you wild, and you can't wait to be done here and find your stable boy to fuck your cunt hard.
It's the day of the ball, and they're short of staff; the footman comes down with a strange case of food poisoning, and the staff calls in your stable boy to fill in the extra space. You see him milling around the room, deftly avoiding the dancers. Even though he isn't looking at you, you can tell he is watching you as you rest your hand on your belly. You can't seem to keep your hands off it these days.
You see him tap a young woman on the shoulder and leans to whisper something in her ear. He looks towards you and winks your cunt clenches. They depart the dance floor and make their way to the edge of the room.
The stable boy leaves as the woman makes her way up to the King. She introduces herself as the queen of a neighbouring kingdom and discusses the politics of joining your domains. The King readily agrees, and you find yourself engaged to her.
Your stable boy finds you later, and you sneak out of your quarters. Rather than going your typical track, he takes you to the guest quarters. You're confused but follow him anyway, and you wind up in front of a guests room. You're about to demand him to take you back to your room when he knocks on the door. You freeze till the door opens, and you see the face of your now-fiancee. She tugs you both into the room and shuts the door behind you.
You find yourself on her bed as she runs her hands over your distended belly; you try to sit up, but your stable boy comes and presses you back into the bed.
"I hear a little prince has been naughty," She says while unbuttoning your tunic. "Whoring around with the stable boy." You squirm under her fingers as her hands find their way to your swollen tits. When you're left naked on her bed, she pulls her girlcock out and sits back to stroke it a few times. Your stable boy manoeuvres you on top of her, lining you up before lowering you onto her cock. She strokes your belly as you fuck yourself on her girlcock, desperately bouncing up and down trying to come.
"As soon as you give birth to this baby, I'm going to put another in your belly." She pants with her head thrown back onto the pillows. "And another after that." You whine at the thought of being her broodmare.
Shortly after, you've been whisked away to her kingdom, with the stable boy coming as a member of the queen's staff. You spend the rest of your days being fucked by them as their broodmare, swelling up over and over.