It was Mother and Father

It was the first time Arya ever felt fear from seeing her parents. Her father was by the pond, calmly taking care of their ancestral Valyrian sword, Ice, whilst her mother slowly lowered to her husband's height with a suggestive smile. The girl wasn't quite able to make out what they were talking about and, apparently, neither was Bran, who was hovering just over her.

But it was what was about to follow next that made her almost gasp in surprise. Her lady mother let out a giggle after a confused look from her father. Watching that exchange, Arya remembered all the times she messed with her little brother's head for some strange reason. But just a moment after, the redheaded noblewoman pulled down her dress, revealing the massive rack she hid underneath her conservative outfit.

The girl was impressed to see that Lady Stark still possessed such a beautiful set of breasts despite her age. As the young lady recalled the times she and her sister bathed together, realization struck her. Now she knew from whom Sansa had gotten her large tits. Arya couldn't help but feel annoyed that she didn't inherit that trait from her mother.

Her father certainly seemed to enjoy her advances though as he embraced the riverwoman and kissed her passionately. Arya gulped, suddenly feeling a surge of desire for her brother standing just behind her.

No sooner the older couple were done with each other's lips, the northman bent over the middle-aged Tully against a tree and unbuckled his trousers. Arya put a hand over her mouth as she beheld the sight of her father's massive cock.

Now she knew where Bran had gotten his endowment from...

Not a moment later, her father lifted up the skirt of her mother's dress and started to... well...

Watching their parents doing such act made Arya grow wet. Suddenly aware that her brother was equally entranced by their parents' lovemaking, the Stark girl got an idea.