Legal Loopholes

With a final thrust, the prince released his lust into the moaning maidservant. He watched her gorgeous face as she was overtaken by another orgasm. Lauren had the most beautiful mouth he had ever seen on any girl, and he loved her expression when she was overwhelmed by pleasure. Her seductive bedroom eyes added to her foxiness. To most people at court Lauren was just a frivolous and often clumsy maid, but she was his favourite mistress - well, together with Heather, the girl lying next to her, already exhausted from their wild threesome. Heather had the most adorable smile, a cute jellybean-like nose, and the most glorious bubble butt he had ever laid his eyes on. The girl just loved getting spanked and being fucked in the ass, and he was happy to help with that.

Kissing both the girls on the head, he got up and started to get dressed. He faintly remembered there being a meeting that he needed to attend to. Or did he already miss it? Not that he cared - having fun with these two cuties was a much better use for his time than politics and all that stuff, but he had to at least show up from time to time. He was his father's only son (with four sisters), so he didn't have to be too afraid for his inheritance, but there was still the theoretical possibility that his mother would have another child at 37 years.

Speaking of his mother - she was exactly who was waiting for him outside of the room. He sighed. "Mother."

She gave him a look somewhere between amusement and reprimand. "Having fun with the maidservants again?"

"I forgot about the meeting, I apol-"

"Forget the meeting. Walk with me."

The prince raised his eyebrows, but did as she asked. Queen Consort Katerina was a fine, elegant woman who could still easily turn heads, especially since she had a preference for plunging necks and dresses that tightly hugged her buttocks.

"I think you have slept with every single maidservant in the castle by now. I hope you're not planning to raise your own army of bastard sons and overthrow your father?"

The prince laughed. "I'll need more maids for that."

"Most importantly, you need an heir. You have no brothers."

The prince sighed. This again. "Mother, I know I'll have to marry. I just-"

She interrupted him again. "I know your excuses. That's why I consulted the Merovic Law a bit more closely."

The prince raised his eyebrows. He had expected the usual discussion about marriage. "You did?"

"Yes, I did. And I found something very curious. The common belief that bastardy excludes a boy from inheritance is not correct."

"What?!"

His mother nodded. "The inheritance law doesn't mention wedlock, it simply demands the heir to be a direct blood descendant of the same dynasty."

The prince quickly lost his excitement again. "Well, yeah, that's just semantics. Bastards can never take their father's dynasty."

His mother smiled. "That's right. Bastards will always be part of their mother's family. Which, of course, means that if one of your sisters had a child out of wedlock, he would be of our dynasty..."

"...but not eligible to inherit, as inheritance is purely agnatic and cannot skip a woman in line. So in the end the result is the same as if it was tied to wedlock."

They had arrived at the prince's bedroom. His mother stopped and turned towards him. "Almost. Bastards of daughters have the right dynasty, but the full patrilineal descendance is interrupted, bastards of sons have that patrilineal descendance, but will not have their father's dynasty - so neither can inherit."

She opened the door. It took him a few seconds to realize what he saw. His large bed, usually reserved for him and whatever lucky peasant girl he had invited for the night, was now occupied by his four sisters. Elizabeth, his twin sister, a very genteel and well-dressed girl, pale with black hair and piercing blue eyes - only she was wearing a quasi-transparent blue silk dress over elaborate lace lingerie. Triss, one year his minor, the bookworm of the family, with red hair and green eyes, now complemented by satin lingerie in those very same colors. Neo, two years younger than him, her hair brown on the right side and pink on the left side, her eye colors exactly the other way round. She was wearing pink lace panties with garters and stockings. And finally the youngest, Marie Rose, only just of age, blonde with black bands in her hair, her petite body clad in a skimpy black leather corset. As they noticed their brother, they all giggled in excitement and turned towards him.

"The one special case of course", his mother said, "being bastards of a son and a daughter at the same time. That's the only way a bastard can legitimately inherit."

She gave him a pat on the shoulder. "I expect your sisters do be all knocked up by the end of the month. Have fun!"

And with that, she left them alone.

This was a response to a prompt on /r/DirtyWritingPrompts