After our intense morning activity, Kotoha and I headed down to the lobby for a leisurely breakfast. We ate without rush, chatting easily. Kotoha let out occasional, happy giggles throughout our conversation. She was a true bundle of joy, her mood elevated even further by the vacation atmosphere.

“There’s a waterfall a short hike from the inn. Should we go?” I suggested.

“Sure!”

The early morning air was humid and fresh, filled with the distant roar of the waterfall. It felt like my soul was being cleansed. The trail was well-maintained, winding through deep greenery. Kotoha clasped my hand, locking our fingers together as she hummed happily, maintaining a pace just ahead of me.

“Souta-kun, are you an ocean person or a mountain person?”

“No strong preference. But if I had to pick, the ocean.”

“The ocean, huh? I’m a mountain person!”

“Why’s that?”

“The air is so fresh. It’s peaceful and quiet. The view is great, too.”

“I like the sound of the waves.”

“The ocean isn’t bad. The saltwater just dries out my hair.”

“I didn’t know you cared about stuff like that.”

“I do now! I’m a girl, you know…” She pouted playfully, making me laugh.

“We’re here!”

Kotoha gave a little jump when we reached the waterfall. It wasn’t massive, but it flowed with powerful grace. She tugged my sleeve.

“Thanks for bringing us here, Souta-kun!”

“You’re welcome.”

“Hehe~ Let’s take a picture!”

“Sure.”

She pulled me down by the arm, leveling our faces for a selfie with the falls behind us.

“…I’ll cherish this picture,” she said softly, holding her phone to her chest afterward.

“It’s just the first of many.”

We’ll grow old together, right, Kotoha?

When we returned to the inn, we found Hikari eating breakfast in the dining area.

“Mom!”

“Good morning, Hikari-san.”

Hikari looked completely normal—refreshed, even. Should I dick you down some more, Hikari-mama?

“Good morning. Where did you two go?” she greeted.

“We went to the waterfall nearby!” Kotoha said.

“Do you want to see it? We can take you,” I added.

“I’ll pass. I’m a bit sore.”

“Why are you sore? You barely moved yesterday,” Kotoha tilted her head, confused.

“Sore from sitting, maybe?”

I was a bit disappointed she didn’t look at me when she said that. We could have shared a knowing glance, or I might have gotten a flustered reaction. Instead, she acted completely normal, as if nothing had happened. A truly sly woman.

“Good thing we have the hot spring,” I said.

“Right?” Hikari finally gave me a small, private smile.

We sat at her table while she finished eating.

“Souta-kun, let’s hop in the bath together!” Kotoha chirped.

Nice idea, Kotoha-chan.

“Hikari-san?” I prompted.

“Hm? Are you inviting me, too?”

Hikari-san, I thought you were supposed to be acting normal? Aren’t you supposed to lecture Kotoha about bathing with a man?

“Umu..? If Mom wants to join, sure!” Kotoha agreed.

“Did you bring a swimsuit, Kotoha?”

“No?”

“I-Is that so..?”

Hikari-san, why are you blushing? And why is Kotoha steering this conversation?

“Are you still joining us?”

“I will.”

“Yay!”

Somehow, things worked out perfectly.

Nice job, Kotoha. Truly the key to my harem.

Now I got to be naked with both of them at once. How was I supposed to contain myself?

We returned to the room.

“Let’s hop in the bath!” Kotoha said excitedly.

As she went to grab her towel, she tugged my arm and whispered in my ear, “I told you, right? That Mom would be fine with it. Hehe~”

With her words lingering, she headed out to the bath first, leaving Hikari and me alone.

“Hikari-san. Are you really fine with this?”

“I don’t mind.”

“Then, shall we go together?”

The private onsen was a small, rocky paradise shrouded in mist. Kotoha was already in the steaming water up to her shoulders, a blissful smile on her face.

"It's so warm~!"

Hikari and I stepped onto the wooden deck. There was a brief, charged moment of hesitation. Then, with a grace that belied her nerves, Hikari untied her yukata.

The fabric parted and fell away, pooling at her feet. For a perfect, suspended moment, she stood fully revealed in the soft morning light.

Her body was a masterpiece of mature beauty. Full, heavy breasts with their pink, inverted nipples, the smooth tone of her stomach, the lush swell of her hips and thighs that spoke of womanly strength and softness.

The memory of last night’s passion was written faintly on her skin in the form of a slight blush across her chest. She was breathtaking.

She quickly slipped into the water beside Kotoha, the surface closing over her shoulders. I followed, the near-scalding water a welcome shock.

We sat in a triangle, the silence heavy but not uncomfortable.

Kotoha sighed happily, sinking deeper. "This is the best..."

My foot brushed against Hikari's leg under the water. She didn't pull away. Instead, her toes gently curled around my ankle. A secret touch, hidden by the roiling surface.

Kotoha, oblivious, splashed some water playfully. "Don't you feel super refreshed, Mom?"

"I do," Hikari said, her voice calm, though her foot traced a slow line up my calf. "It's very... relaxing."

My own hand found Kotoha's thigh under the water, giving it a gentle, affectionate squeeze. She smiled at me, her eyes soft.

In the steamy embrace of the onsen, surrounded by the two women I loved, a profound sense of rightness settled over me. This was the beginning.

After the bath, Kotoha was buzzing with energy. "Souta-kun, let's go out and explore!"

I glanced at Hikari, who was wrapping herself in a fresh yukata, her movements sluggish.

"Hikari-san? Will you join us?"

She offered a soft, tired smile. "I think I'll stay and rest here. You two go on ahead."

"Okay! Don't go running off, Mom!" Kotoha teased, grabbing my hand and pulling me toward the door.

I gave Hikari one last whisper as I passed by her.

“I’m sorry, I’ll spend more time with you soon.”

Hikari responded with a gentle smile.

@@

Once they were gone, the room fell into a deep silence. Hikari stood alone for a long moment.

Bathing together… It’s surprisingly thrilling..?

Her hands went to the knot of her yukata. Her fingers, usually so steady, fumbled. The fabric fell open. She didn't rush to cover herself. Instead, she looked down at her own body. The breasts he had suckled until they swelled, the stomach that had clenched under his thrusts.

My... look at this... I'm still so puffy... and wet... just from remembering...

She sank to her knees on the plush tatami, then laid back, spreading her legs without shame. The cool air hit her slick folds, making her shiver.

Last night... he was so big... he stretched me so wide... I came over and over... calling him "Souta-kun" while my daughter slept next door...

Her hand slid down her stomach. Her fingertips brushed through her hairless slit, already soaked. A low moan escaped her as she circled her clit.

I can still feel him... pounding into me... filling me up... calling me... "Hikari-mama"... and I came just from that... What’s wrong with me..?

She plunged two fingers inside herself, gasping at the fullness. It wasn't enough. She fucked herself with her own hand, imagining it was Souta.

More... I need more... I need to feel him again... I want his cum... I want to taste it... I want to see his face...!

Her other hand pinched and pulled at her nipple, the sharp pain-pleasure making her cry out. Her hips bucked off the floor.

I'm so dirty... so depraved... a mother touching herself while thinking of her daughter's lover...! But I can't stop... he ruined me... he made me into this hungry, lustful thing...!

Her movements became frantic, sloppy. The lewd, wet sounds of her fingers pumping in and out of her dripping slit filled the empty room.

I'm coming...! I'm coming just from my own fingers thinking about him...! Haaah... S-Souta-kun...!

She reached her limits as her body convulsed, her back arching off the floor. Her inner walls clamped down on her fingers, milking a phantom cock as her release gushed out, soaking her hand and the tatami beneath her.

A slow, lewd smile touched her swollen lips.

I should control myself. I don’t want him to see me like this.