Herself

"Jon... my protector... my brother... tell me what my strong knight wants from his little sister as his reward." Arya pulled the sheets down, revealing her body to Jon. She was athletic, and while she had the wide set hips of her mother, many hours riding, running, and practicing with her "dancing master" had kept her breasts small, but gave her rear the appealing shape of a ripe, white peach.

Jon climbed into the bed beside her. They had been in bed together before, even naked, and had touched each other everywhere. Together, they had learned the ins and outs of each others bodies, but they hadn't yet made love. "Sis... I won't take your maidenhead until we can be married." He rolled her over onto her belly and took a place behind her. "But I will have you, at least this way."

Arya gasped as she felt him press the head of his massive manhood against her tight anus. She really would have given him everything if he asked, but for the moment, she was happy to give him this, and for him to give more of himself to her. "Promise, Jon? Promise you'll marry me and give me a baby soon..."

"Yes, Arya. I promise." He gripped her hips and slowly pressed into her, and she responded by groaning and pushing back against him. "You're mine, Sis. Tell me how it feels."

Arya bunched up the sheets in her hands and merely mewled in response. "You're so big... Jon. I want to feel all of you, though."

Jon pumped in and out, shallowly at first, and the tight ring of muscle slowly grew to accept this new invader. With each stroke, Jon entered her more deeply, until at last his hips met her cheeks with a SMACK. He reached a had around to play with her clit as he pistoned into her.

"Gods, Arya... you're so tight... thank you for this." Jon groaned as he continued to ravish her ass, claiming her as she squeaked, moaned, and writhed beneath him. She felt perfect around his girthy member. He knew that society would frown on their current activity, but with everything he had seen in the capital, how could two people in love be wrong?

Arya turned her head to look at him, craning her neck. "Jon... big brother... I can feel you twitching inside me. Please... finish inside me. You can't put a baby in me back there, so just please..." She screwed her eyes shut tight as she came undone, and he plunged as deep as he could, bending over her back to kiss her hard as he felt himself unleash a massive load into her. He pumped jet after jet of his white hot seed deep into his little sister's ass, feeling her buck against him as he filled her, his climax seeming to last forever as he poured more and more of himself into her tight hole.

When he finally finished and came down, he held Arya fast against him. "Soon, Sis." He placed his hand over her womb. "Once we're wed." It was tempting to fall asleep like that, but both knew that the court would not be busy forever. The kissed and held each other for as long as they felt they could get away with before dressing and heading back to their separate quarters.