He can't refuse her

He didn't want to abandon his sister again. Bran looked around, they were the only ones there. Having her naked there shouldn't be a problem, he could always look away after all.

"I'll stay then." The Stark decided. He was sure that he heard a squeal of excitement from her.

Bran found a conveniently placed chair where he could wait her finish cleaning herself. He made a mental promise to be in his best behaviour and not look at her. The lad heard a splash of water followed by a moan. He took a glimpse only to see Arya's head sticking out of the pool. He smiled learning of the satisfied expression on her face.

The young lord made an effort to find interest in the limestone wall or how the water rippled. But then, part of her bare figure managed to sneak into his field of vision. It was hard to contain a gasp. He repeated over and over the oath he made inside his head, all the while Arya hummed and made other sounds in the water.

A few moments passed like that and Bran could not contain his curiosity any longer. He was still the kid from Winterfell who'd peep at Sansa in the Godswood. He finally decided that he'd just have a quick peek at her.

What was supposed to be a quick peek turned into a generous glimpse, and a generous glimpse turned into a detailed view. Her figure was fragile, she was skinny and full of scratches, cuts, grazes and some dog bites. But she was somehow still beautiful. Her chest was not the biggest he'd seen or cupped, but her body had a youth to her which reminded him of home. He imagined them back in Winterfell, in a time where things were less complicated.

Before Bran could notice, he was getting a hard-on between his legs...