A Sister is Satisfied and so is a Brother

Byleth sat down on his bed in his room later that night.

It was a nice room, well furnished. Felt pretty odd truth be told. His youth had been spent upon a bedroll beside a campfire or on a meager bed at an inn (that more often than not he had to share with Deneb). This... this mattress beneath him was so soft it might as well been a cloud.

He didn't know what to think about his circumstances, his sudden elevation in the world. He was excited by the opportunities to assess the varied bosoms of Garreg Mach to be sure, from the elite to the common servants. But he'd be lying to himself if he thought he was ready to be teaching the skills of warfare to Fodlan's latest noble scions. Then there was that dreamlike green-haired girl.... Sothis, who had turned back time to save his life. Was she a goddess whose domain was the passage of time? And how had he , a common soldier, gained her interest?

Surely that had been a fevered dream brought about by excessive spirits in the midst of battle...

Byleth shook his head slightly, feeling a familiar pulse in his crotch. His affection for the perfection that was the female breast was something he liked to see as beyond the base desires of his groin, but it was impossible to deny the sexual satisfaction he did still receive from his constant and vigorous exploration this day. He felt a smile twist his lips upward as he recalled their encounter with Claude von Riegal after finishing with Edelgard. The heir to the leading house of the Leicester Alliance had a keen eye for the particular foibles of people. He'd drawn By and Deneb to him like insects to a firelight with four of his house's beauties, flanking him in supposed casual conversation.

Hilda, Leonie, Lysithia, and Marianne. By had thoroughly fondled their chests as his sister interrogated and flirted with Claude. Leonie was a red-headed disciple of his father's, what she lacked in breast she seemed to more than make up with her lusty demeanor, her thigh slipping between his leg to press against his bulging groin. A true lusty mercenary she seemed to be....

Marianne had a hidden bosom of generous proportions, and her blush as he hefted her lovely jugs was a beautiful thing. Hilda's bountiful titflesh had nicely filled his palms, the pretty pinkette taking the opportunity to rest against him as he had his way with her. Lysithia had a small chest that he enjoyed to his heart's contents, the petite girl quite unable to speak as he expertly stimulated her slight teats.

This left him with a particular issue at the moment, one straining his pants. A brothel is what he needed but he was quite sure the holy monastery of Garreg Mach lacked such common-sense establishments. He groped his manhood through his pants and wondered how his fellow Breakers were dealing with the situation. They had been assigned an empty barracks at the outskirts and he had little doubt the lust filled warriors were crawling up the walls already.

His thoughts naturally moved towards his twin sibling and how she was dealing with the situation. She had her own room beside his and he got up and stepped out into the cool night air to visit her. Their rooms were part of a long structure whose doorways opened up onto a covered porch that ran the extent of the building, a grassy courtyard beyond.

Byleth knocked on her door and it was soon swinging open to reveal his sister with a knowing smirk. She'd taken off her armor but the rest of her usual outfit was in place which meant she looked exactly like a high-class whore. Her insistence on the utility of distracting her mostly male opponents was the supposed reasoning for her sartorial choices, he was less convinced... In any event, her immense teats practically spilled out of the loose half-shirt she wore underneath her cuirass as a matter of course, the tops of her light brown palm sized aureola perfectly visible.

"Oh By, is it my turn now?" her eyes sparkled with mischief and he rolled his eyes heavenward as he stepped into her room.

"Actually, conversation was my intention. But if you're offering..." His fingers practically itched to feast upon those tremendous mounds. His sister's breasts were one of a kind and their close relationship meant he could ask her to remove her top with little issue so he could appreciate them properly...

"Oh I'm offering! I've been waiting for the hands of the master on my tits all day! You know how pent up I am!?"

He spun around towards her, his brows pressing together furiously, "My hands are going nowhere if you're going to get off on this! That's sick."

She closed the door and groaned, crossing the room to sit upon her bed, "SUCH a prude! I'm not talking about your dick in my cunt, By! Gods!"

Byleth was suddenly recalling just how lusty a mercenary his sister was as well as the current state of his loins. This was a bad idea. He had absolutely no interest in having sex with his sister, but he was rather less sure of her own proclivities on that matter given her devil may care personality. He was just about to beg his leave when she pulled her top off. He didn't quite lose his mind as he had seen them uncovered before, in brothels and baths. But for some reason his memory held only the slightest of candles next to the roaring bonfire that was his appreciation now.

The glory of her naked, mighty tits was impossible to fully behold. His mouth dropped open and she cupped them proudly, arching her back so that they rose up into the air as much as his penis wanted to within his the tight confines of his pants. They were incredible, two smooth mounds of female flesh that stuck out a mile before tapering to twin equally energetic aurolas and finally two long and hard nipple-capped points. Without any support their mass completely covered his sister's svelte tummy, giving the impression of a much larger woman atop her fairly trim and muscular body.

Deborah's expression was smug as she cupped and juggled her huge perfect boobs.

Byleth couldn't resist, muttering, "Gods... they're beautiful. No woman can compare..."

He sat heavily next to her, hands moving to her chest as he breathed, "So fucking perfect..."

He slid his palm along her mounds, brushing over her thimble-thick erect nipples with his fingers. The effect his touch had upon her was obvious, Deneb shivered and she gasped before her teeth sunk into her lip. He kept his touch gentle as he felt up her huge rack with each hand, taking his time, appreciating their enormous mass and size. Each time he drew a circle and bumped his fingers into her nipples, she let out a soft moan.

"Does this seriously feel that good?" he honestly found her reactions to be embarrassing and slightly alarming, given the situation.

"Ah! Sh-shut up!" She gasped and arched her back, pushing her chest into his hands, "It's- ah! You're the connoisseur! Gods, it should be normal for you not to mind giving a girl- any girl- a climax with those skilled hands of yours on their breasts!"

For some reason a lot of Byleth's angst about the current situation abruptly evaporated. Getting his sister to cum and release all of her pent up tension was simple common sense at this point. She was one of those fortunate women gifted with sensitive breasts and he intended to make sure she experienced a nice strong orgasm from his skilled hands. Certainly, she'd be less trouble with her passions sated. He picked her up and pulled her onto his lap as he sat upon the bed.

No doubt she was aware of the presence of his erection pressing into her fleshy behind, but he was well aware she couldn't care less about such things so long as he continued to sate her strong desires. Deneb leaned back against him, her head lolling on his shoulder as she moaned in response to his groping hands on her huge long breasts. He could sense it. It was normal for him to give a girl, any girl, a climax with his skilled hands on their breasts. This meant he practically had a sixth sense for this sort of thing. His sister was seconds away from having an orgasm at his hands. Right now. In this moment he had compete control of her body, her arousal. He was uncomfortably aware that Deneb had to be wholly wet between her legs.

He was quite sure there was something of a puddle on his lap.

Her large boobs bounced around as she thrashed with pleasure atop him. She was about to reach climax at her brother’s hands.

Deborah let out a screaming moan as she came.

As she came down, she lay on top of his massive twitchingly hot erection several minutes, breathing heavily and twitching with the aftershocks.

Even as she was coming down from her pleasure, Byleth was left lying there, pulsing with pleasure and unfulfilled need.

His sister chuckled slightly and shifted knowingly atop him, "Now what are you going to do about that big boner, you're sporting? Going to love yourself while thinking of my breasts, hmmm?"

"Well now... That's none of your concern, is it, sister?"

"Says the brother who just gave his dear sis so much satisfaction... You know... the normal thing for you to do with that ferocious cock of yours would be to find some maid to woo and drain those fat ball of yours post haste, huh?"

Less than an hour after her dear brother left, she heard him return to his room, a soft feminine voice accompanying his measured tone.

Deneb lay in her bed, loins still soiled but well satisfied, tickled to play the voyeur to his little conquest that she'd initiated.