Very risky. That's the situation created by Hina when she opened up the curtain as well. At any moment, even if the cuck beyond the window couldn't get a clear picture of what was happening inside the room, the possibility of him making a scene that Uncle and Auntie could pick up downstairs was high.
But knowing Ogawa who rarely showed that he possessed the balls to do something, Hina probably banked on that fact which gave her the confidence to pull this devious plan off.
Besides, for the girl, as long as he would be tormented by watching this scene, that would be more than enough to satisfy her thirst for revenge.
Was it similar to how Satsuki felt for Sakuma before I fixed that for her? Maybe… Nonetheless, instead of getting more turned on at the thought of Ogawa being aware of how far we've reached in our relationship, it's more of a bittersweet revenge to show him what he threw away.
Tormenting him was the goal. Yet, Hina clearly didn't care too much about what the cuck was supposed to feel in this situation. As long as she slapped him with the reminder that he wasted her years of affection for him, that's already enough.
She proved that earlier when even with his presence in the same room, the girl focused on me, leaving him frozen still by the door.
It's the same thing this time yet taken to another level because of Kazuha-nee's presence in this room.
It's all on him if he can manage to piece together the clues that his Aneki is in the same room as us or he'll be distracted by the show in front of his eyes.
Anyway, back to the present.
Because of this situation where I had to hold Kazuha-nee close to me so she wouldn't leave the room, I could only stay still and be a recipient of my girl's skillful hands and mouth.
Nonetheless, even though I was pretty much immobile, the pleasure brought about by it was heightened a lot. I had to stop Hina twice to allow me to rest to prevent myself from shooting it right away.
And in the span of a few minutes, Kazuha-nee, who could only listen to the sound produced by Hina's mouth as she sucked and licked on mine, gradually became more responsive. The lack of sense of sight heightened her sensitivity and more than once, she rubbed her legs against mine or let her hand feel my warmth directly.
Although she would always retract it as though she was doing that unconsciously, it happened more times than I could count.
Hina was also aware of it. And so, perhaps to get more reaction from Kazuha-nee while also ignoring what the guy on the other side was doing, the girl made the sounds more exaggerated and started describing it as if she was eating a delicacy.
Due to that, I soon noticed Kazuha-nee furtively moving her head to take a peek at what Hina was doing. She did it in a very subtle way as if she was taking caution not to let me notice.
Well, too bad for her, with how close she was to me, it was very easy to monitor her movements.
To save her face, I naturally acted oblivious to it. But that's not the case for Hina.
After letting it go a few times, she soon locked eyes with her and made a gesture.
She didn't call out to her but the girl pushed my length down against my navel and let it rest there. In that way, the tip pointed directly at Kazuha-nee.
Then, Hina provocatively licked it from its base up to its tip before gobbling it in her mouth again.
Doing that a few times in succession wherein she would end up bobbing her head intensely that I couldn't help but let out a subdued moan, instead of going back to simply burying her face in my neck, Kazuha-nee started watching Hina's endeavor attentively.
Her hand gripping my robe also remained on my chest and slowly but surely, started traveling downwards.
Furthermore, the woman also began checking on me, perhaps hoping that I wasn't looking at what she was doing.
Naturally, I acted flawlessly oblivious by raising my chin and putting my arm over my eyes.
When she noticed that, Kazuha-nee's hand traveled quicker and soon reached my navel. A short distance away from where my cock was reaching whenever Hina would push it down.
At this point, Hina who seemingly wanted to reel Kazuha-nee in our situation finally made it evident that she was aware of what the woman was doing.
She called out to her invitingly, "Kazuha-nee, here… hold it like this."
When I looked down again, Hina was holding Kazuha-nee's wrist as she guided her hand to my erection.
"This… No. I shouldn't." Kazuha-nee resisted before she could touch it directly, pulling her hand back.
She then looked up and our eyes intersected resulting in the girl's expression reddening completely before returning to her previous position where her face was buried at the side of my neck.
Upon seeing that, Hina didn't say anything but instead chuckled at how close she was to her goal. She then glanced towards the window. Considering she was at the foot of the bed, she could probably see Ogawa there, peeking at what was transpiring in this room.
He had yet to do or say something. He probably failed to put two and two together yet.
Hina smirked at him before turning around and sliding back to my side. While her hand continued stroking my length, she proudly whispered to me in a voice that couldn't be heard by Kazuha-nee what Ogawa's reaction was beyond that window.
"He's red-faced Ruki… And when I met his gaze, he ashamedly turned around as if he got caught red-handed. What should I do next?"
"Let's see… I'd like to say it's up to you since it's your birthday but… I bet you're here to consult me, right?"
"Hehe. I know you'll understand me… I'd like to hear your opinion. Should we focus on Kazuha-nee or Kazuo?"
"Why not both?" There's no need to choose when we could both go after them. Kazuha-nee had the possibility to fold if I urged her while Ogawa would be seething in rage when he finally recognized that the other woman inside this room is his sister.
"Hah… Ruki, I'm still not a match for you when it comes to being devious."
"No. You're the one who steered this situation to this extent. I'm only in a supporting role here."
Right. This was only possible because of her. In fact, I was only following her lead.
"Yet you're the one benefitting the most."
"Uh… Yeah. I can't deny that."
"Pfft. Kiss me, lovable idiot… After this day, I'll let go of my petty revenge against him and focus more on protecting our complex relationship… Kazuha-nee is a plus."
Upon declaring that, Hina didn't wait for another second to take my lips in a more passionate way. And after spending a minute or just conveying our feelings for each other, Hina once again crawled back down to execute our plan.
We still had no idea what the result would be but with the two of us working together… I could confidently say that this would be a piece of cake…
"Kazuha-nee, aren't you curious?" Putting half of my focus back on the woman at my side, I started with that simple question to gather her attention.
Hina, on the other hand, once again captured my length in her mouth, resuming what she was doing in order to entice Kazuha-nee and make the cuck in the room across seethe in envy.