Chapter 623: Forced Into Submission

While Aqua continued to enthusiastically play with his abs—fingers tracing every ridge and valley with an adoring look in her eyes—Cassius sat stiff and frozen on the low wooden stool.

He didn’t know what to do.

He didn’t know what to say.

His face was a perfect mask of confusion.

Brows furrowed, mouth slightly open, eyes wide like a deer caught in lantern light.

And just like on the outside, he was reeling internally as well.

After all, just moments ago he had told her that story—the one about the tiny barking dog and the childhood humiliation that had sparked years of secret training—because he genuinely wanted to make a good impression.

It wasn’t even a lie; the original Cassius really had done exactly that.

He had trained, had pushed himself, had wanted more than anything to become someone who could stand in front of his big sister and protect her.

But the moment Aqua left for the capital, that same little boy had crumbled.

The motivation evaporated. Depression swallowed him whole. Training stopped.

The downward spiral began.

And Cassius, the current one, had only repeated the story to honor that past version of himself.

To give Aqua something warm and sweet to smile about.

He had expected her to blush, maybe giggle, maybe ruffle his hair and call him cute.

He would have been satisfied with that.

Instead—

Instead she had turned into something else entirely.

The funny, caring, slightly clumsy big sister who used to tease him and sneak him extra desserts had vanished.

In her place was a woman with heavy-lidded eyes and parted lips and a gaze so hungry it reminded him of the way his wives looked at him in bed.

The same devouring stare.

The same barely-contained craving.

Except this wasn’t one of his wives.

This was Aqua.

His sister.

And he had no idea how the hell this had happened.

Normally he was the one making moves.

He was the one pulling women along, guiding them gently into his orbit.

He knew exactly how to read a mood, how to tease, how to escalate.

But now?

Now the roles were reversed.

Aqua was the aggressor.

Aqua was the one pressing soft, warm breasts against his back, dragging hardened nipples up and down his spine, whispering filthy-sweet things into his ear while her hands roamed shamelessly over his chest.

And the worst part?

He couldn’t even enjoy it.

One part of him—the primal, male part was screaming in pleasure.

Every brush of her fingers sent lightning down his spine. His cock throbbed painfully against the towel, harder with every teasing stroke.

His body wanted this. Badly.

But the other half of him felt like a victim.

Like an actual little brother being molested by an older sister who didn’t know or didn’t care that she was crossing every line in existence.

He felt frozen. Paralyzed.

The same instinctive freeze response that real victims described: wanting to scream stop but the words wouldn’t come, wanting to shove her away but his arms stayed locked at his sides.

Not to mention, that he had been submissive before and he loved it, even.

When he let one of his wives ride him until he was begging, when he surrendered control because it felt good to let go.

But this wasn’t that.

This was being forced into a role he never asked for.

And he hated it.

He hated how small and helpless it made him feel.

He hated that he couldn’t even tell her to stop.

All he could do was sit there, while his sister molested him under the guise of ’washing.’

Aqua, meanwhile, was in a completely different headspace.

The rational, consequence-aware part of her brain had shut off entirely.

What was running the show now was pure primal instinct.

Sisterly love twisted together with raw, feminine desire until the two were indistinguishable.

She couldn’t think about tomorrow.

She couldn’t think about how wrong this was.

She could only feel.

Feel how warm his skin was under her palms.

Feel how hard his muscles jumped when she dragged her nails lightly down his sides.

Feel how his cock twitched and strained against the towel every time she shifted closer.

And gods—she wanted to touch it.

She needed to touch it.

Her body was burning hotter by the second and her own pussy throbbed in time with her heartbeat.

She could feel fresh slick gathering between her thighs.

So slowly, she slid one soapy hand down his abdomen, stopping just above the towel’s knot.

She leaned in until her lips brushed his ear.

"Cassius..." She whispered, voice low and sultry. "Could you tell your big sister...what exactly is happening under this towel right now?"

Her fingers ghosted over the fabric—barely touching, but enough to make his cock jump violently.

"I don’t have much experience myself."

She continued, lips curving into a playful smile against his skin.

"But even I can tell your penis is getting quite hard. Really hard. It’s practically lifting the towel like it’s some sort of flag waving hello."

She gave the towel a teasing tug, just enough to make the fabric slide an inch lower.

"Look at that." She purred. "It’s pitching such a big tent. So...are you possibly getting turned on by your big sister washing you down? Hmm?"

"Is that what’s going on down there?"

Cassius’s breath hitched. His entire body trembled.

"N-No—" He managed, voice cracking. "This...This is from earlier. From when I was with Portia. didn’t...finish. So the erection, it’s just...lingering."

"You don’t need to worry about it, Aqua."

Aqua hummed thoughtfully, as her hand drifted lower, sliding along the crease where thigh met groin.

"How can you say that, Cassius?"

She pouted, lips brushing his earlobe.

"How can you disrespect your poor, aching cock like that and tell not to mind it? It most definitely needs attention."

"And I will admit you were already hard when I started." She murmured.

"After fucking Portia’s ass so thoroughly, you were still this erect. Still strong. I could definitely see that since from the moment you tried to help me..."

"...but it wasn’t as hard as it is now is it?"

Her fingers finally grazed the thick outline through the fabric.

"I mean, even now it’s getting even harder. Bigger. Hotter. I can feel it twitching under my hand...growing every time I touch you."

She licked his ear again like it was a treat.

"You’re getting turned on by your big sister, aren’t you?" She whispered. "You like this. You like it a lot."

Cassius’s hands clenched into fists on his thighs.

"I—I—I—"

"Shhh." She kissed the side of his neck. "Tell me, Cassius. Tell big sister you like it."

Her hand began to stroke, slow, firm drags up and down the length through the towel.

His hips jerked involuntarily.

"I know you do." She cooed. "I can feel how much you like it. So tell me. Say it. If you do..."

She leaned closer, breasts flattening fully against his back again.

"...big sister will wash this place too."

She promised, voice dripping honey.

"After fucking Portia’s ass like that, it’s surely quite dirty. Quite a mess. So, big sister needs to make sure her little brother’s penis is perfectly clean...inside and out."

"Make it clean again...and then make it dirty in a different way."

She nipped his earlobe.

"So tell me you’re getting hard because of me, Cassius. Tell me your cock is throbbing for your big sister."

"Say it...and I’ll wash every inch of you. Thoroughly."

Cassius’s breathing was ragged now, chest heaving.

The internal war was tearing him apart.

One side screamed to push her away.

The other side was drowning in how good her hand felt.

Under the pressure, under the heat, under the relentless teasing—

—he broke.

"Y-Yes..." He whispered, voice shaking. "My penis...my penis is getting so hard right now."

He squeezed his eyes shut.

"I don’t know why—I know I shouldn’t—but...it’s getting so hard..."

Aqua’s smile turned radiant, triumphant and tender all at once.

"Good boy." She breathed against his ear. "Now let your big sister take care of the rest."

Her hand slipped beneath the towel.

And wrapped around him.

Skin on skin.

Finally.