Life went on. Within days of taking her virginity, Reva began sleeping in Kyrie's room. To better perform her duties in guarding her royal person, of course. It didn't strike anyone as strange. They were known to be best friends and were women of vastly different species anyway, so it wasn't as though anything improper would happen.
Neither woman divulged Reva's other duty, the real reason she was in there: to keep her horny royal bitch well-fucked, so she might go to bed every night with her mistress' cum in her belly, if not her cunt or ass (or often all three).
Of course, the centaur would break any bed she mounted, so she ordered a custom one from her homeland, sturdy and box-like beneath its mattress and furs. She would fold her hindlegs atop it and leave her front hooves on the floor, and simply ease off when it was time to get up.
That didn't strike anyone as strange either. Had anyone been more curious and inspected it, they would find the 'frame' of the bed was really a cage with a hidden hole in its roof, positioned just so for a centaur's unsheathed cock. They were common for the tribes and allowed akhina to attend to their cock-related duties without getting in the way.
It gave Reva plenty of time to read or tend to her weapons without a cock-hungry Kyrie getting in the way. The royal slut loved to slip under there when people would come looking for her, and on more than one occasion she came on Reva's cock while the centaur was chatting with the servants cleaning the room.
Really, Reva was proud of Kyrie. She had been worried at first that the spoiled princess could ruin everything, but she fell into her submissive place perfectly; her mistress did not need to explain that Reva decided when she was an akhina, and when she was a princess.
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"You said that if I completed the ritual, I could ride you. I completed the ritual, so let me ride you for the parade." Kyrie had that stubborn look in her eyes again. The two of them were in a private training chamber beneath the castle, well-lit and heated by braziers in each corner with sand strewn across the wooden floor. A few pieces of plush furniture were off to one side, for observers or resting between exercises and bouts.
Reva had never explained to Kyrie that there wasn't really a ritual.. Centaurs simply didn't let anyone who wasn't their akhani ride on their back, and even then that was to show their property off, not for pleasure. There was a ritual in the sense that Kyrie was now her akhani, sure.
"It doesn't work that way, Kyrie." Reva replied as they circled one another, a padded wooden stave in one hand. The runes enchanting the princess' wooden training sword glowed pale blue. She held it in a clumsy, one-handed grip, though at least she was comfortable in her tight leather 'armor' given to her by the Queen; amazons opted for freedom of movement over protection. Kyrie was effectively wearing a bra, a skirt-like loincloth that bared her thighs, knee-high boots and elbow gloves, most of her fair skin on display. Her hair was tied back in her preferred ponytail, more practical for sparring than intricate.
Just the way Reva liked it, honestly.
"Well, why not?" the princess frowned, narrowing her eyes and shifting her hips tellingly. As she sprung forward to slam the blunt blade down, Reva was already stepping to the side. Sand scattered up and the floor cracked with the impact. Kyrie yowled with surprise as the flooring splintered upwards, abandoning the blade in favor of protecting herself from it with flailing hands. Amazons could be frightfully strong with adrenaline pumping through their veins, and without the weakening enchantment on the sword the damage could have been far worse. In most circumstances, Kyrie was simply an eighteen year old girl who hadn't worked a day in her life.