"Wife, it's really nothing. It won't affect our relationship."

"Just like how you worry about me not being able to release and encourage me to be with other women, I'd support you if this is what you're into too."

Seeing the encouragement in her husband's eyes, even though she found it absurd, Lily gritted her teeth and abruptly lifted her sister's top.

"Ah! What are you doing?!"

Nancy cried out, but by then her full breasts were already exposed to the air, perhaps because the atmosphere was so lewd.

Being watched by her sister while she jerked off her brother-in-law, and breathing in that familiar, exciting scent, her mind was in chaos, but her body was already aroused.

"Elder sister, looking won't cost you anything!"

Lily knew her sister's personality and deliberately used a taunt: "You have such a great figure, why be afraid of people seeing it? You said it yourself, it doesn't matter."

Hearing this, Nancy glanced at her brother-in-law's excited face, then recalled their secret flirtations during this time. Gritting her teeth, she cooperated and took off her top.

Her full, beautiful breasts swayed as they were revealed, a spectacular sight that made Luis stare wide-eyed.

It wasn't his first time seeing them, but this time it was in front of his wife, a milestone with entirely different meaning.

"Hmph, I've got every reason to be confident about my body."

Nancy's trembling hand gripped the cock again and began actively stroking it, though her hurried breathing betrayed her inner panic and guilt: "You awful Lily, how could you do this? If Mom found out, she'd scold you to death."

Lily giggled and became more aggressive, trying to take off her pants.

As a result, Nancy dodged her grasp and said very seriously, "Alright, stop fooling around. Are you really going to make me sleep with your husband? What do you take me for, a whore?"

Luis understood the principle of gradual progress. Even if Nancy agreed in her heart, it was impossible for her to yield immediately.

After all, her strong-willed nature demanded a way to save face.

Acting as a mere tool, Luis spoke up for the first time, "Lily, Sister is a married woman, after all. This... isn't it inappropriate?"

Nancy was so flustered and distraught that she completely failed to notice the meaningful glances exchanged between the young couple, almost as if they were scheming against her.

In fact, this moment felt strangely sacred to Luis. He realized that under his guidance, his wife was truly beginning to confront her bisexuality, and those lewd words she spoke were not just empty.

Tears welled up in Lily's eyes, shimmering with the happiness of being understood.

She had always encouraged her husband to stray, and though Luis had indeed done so, he never dared to tell her. Thus, Lily remained in the dark, burdened with overwhelming guilt.

She thought that if her husband found another woman, it might ease her conscience. Her cuckquean fantasy had led her to imagine such scenarios and their tantalizing ripples countless times.

But she was terribly afraid, afraid her husband would doubt her love, afraid he would mock her as a pervert and look down on her.

Truth be told, compared to Luis, who appeared cautious on the surface but led a wildly promiscuous life behind the scenes, Lily was the one truly deeply in love. She didn't dare make a single move without her husband's approval.

"Ah! What are you doing..."

Nancy cried out in surprise, her eyes widening in shock.

From behind, Lily hugged her tightly, her full breasts pressing against Nancy's smooth back. Her hands moved upward, grasping her sister's plump, enchanting breasts, already kneading them with impatient eagerness.

Her body was already highly aroused and sensitive. The roughness of a man's hands was nothing compared to the soft delicacy of a woman's touch.

The sensation was so intensely pleasurable that Nancy's entire body went weak, the space between her legs growing even wetter. Although she had inherited some of the same sensitive traits and found it deeply satisfying, her heart was still filled with panic.

Most importantly, in her mind, her younger sister had always been the meek one she could push around. The audacity of Lily acting like this in front of her husband was simply unbelievable.

"Big Sister, what's all the fuss about? When we bathe together, we've all touched each other before."

Noticing Nancy's fierce struggling, Lily continued to fondle her while playfully blowing warm breath into her ear, her tone dripping with seduction:

"Oh, and Sister, like I was saying earlier, I haven't been feeling too great lately. Think of this as making it up to me."

"You... what do you mean, not feeling great?"

At those words, Nancy's struggles ceased, her heart filled with guilt but also burning curiosity.

Seeing that the usually proud Nancy had stilled, even her hands stopping their motion, Luis wisely recognized that, as a mere tool in this scenario, he shouldn't expect any grand fantasy of a threesome with the sisters.

If it were another woman, like Chloe, for instance, it might be possible.

But between sisters, who knew each other so intimately, even if they were succumbing to desire, there would be much to talk through. This seemed like a crucial moment to resolve underlying tensions.

The moment Nancy's hands stilled, Luis snapped out of his reverie and moved to sit aside.

He lit a cigarette and took a slow drag, smiling meaningfully. "Wife, I don't dare touch recklessly. What if Brother-in-law comes after me? You just enjoy yourself."

Both sisters were taken aback. A trace of hidden resentment flickered in Nancy's eyes, though it couldn't mask her current fluster.

Lily, however, gave a grateful smile. This was the first time she had ever made advances toward her own sister, and she was inwardly panicking, unsure how to proceed. With Luis suddenly sitting back to watch, she could at least pretend this was all just playful teasing.

"If you won't touch her, I will!"

Lily abruptly pushed her sister down onto the bed, her delicate hands boldly kneading Nancy's full breasts.

Nancy nearly moaned aloud. Gritting her teeth, she struggled briefly before Luis interjected with a laugh, "Sister, don't struggle too much. Lily is still pregnant. There's nothing too wrong with sisters touching each other, right?"

Hearing this, Nancy didn't dare move anymore, panting heavily. "You little brat, stop messing around. Your husband has already seen me naked, okay?"

"No touching, kissing, or licking yet, but Sister's breasts are so firm and bouncy. I'm tempted to let Luis have a feel too."

Lily vigorously massaged her sister's ample bosom, unable to hide her excitement as she licked her lips, then glanced shyly at her husband.

Luis responded with an encouraging smile. Though the massive bulge in his pants twitched with arousal, he didn't want to disrupt his wife's rare moment of excitement.

"You wretched girl, you seem so proper on the surface, but you're such a pervert deep down."

Nancy snorted stubbornly. "Don't... don't rub anymore... Are you insane? What kind of wife lets her husband see her sister-in-law's body?"

"It doesn't matter."

Lily giggled mischievously. "In my heart, there's no difference between you and my husband's mistress. If I didn't think that way, I'd be so jealous I'd die of anger."

"What nonsense are you spouting? His mistress?!"

Nancy's eyes widened in disbelief. Her pride would never allow her to accept such a label.

"Or what, you want to be the main wife instead?"

Between blood sisters, shame and ethical boundaries still carried weight, creating underlying tension.

Lily only dared to fondle her sister's breasts, not yet brave enough to kiss them. But then her expression turned serious, tinged with unmistakable jealousy.

"Sister, I've been burning with jealousy lately. The least you can do is let me tease you a little to balance things out."

"You... what do you have to be jealous about?"

Nancy asked, her voice heavy with guilt.

"Hmph, don't play dumb. When you were arguing with your husband and mother-in-law, you and my husband were perfectly in sync, like an old married couple.

All this time I've been at work, you and Luis have been inseparable.

Renovating the house, buying furniture, you two handled everything together. Planning Mom's birthday party, deciding on the venue and gifts, again, just the two of you.

Even with family matters, you two are like a perfect match. At this point, I think my brother-in-law is garbage, you and my husband look like you were made for each other.

And the key thing is, you two never even argue."

Lily was actually quite nervous herself, but now she held her sister's delicate body tightly and said gravely, "Sister, I'm truly jealous. You and Luis seem like a match made in heaven.

The fact that you're always together, even buying a car without me knowing, how can I, as the actual wife, not feel resentful?

So many things were decided and done by just the two of you, without ever consulting me...

Not to mention, you've bought so many expensive things for the house, spending all that money without a second thought."

Aside from her awakening unusual kink, Lily had also been suppressing a simmering resentment. Now, she voiced it without holding back:

"Sister, you and my husband have been attached at the hip all this time. Did you really think I wouldn't be jealous?"

Lily's hands began kneading her sister's soft, full breasts more vigorously, her voice trembling with excitement. "Don't think I haven't noticed, you've been jealous of me too, haven't you?"

"I... I haven't..."

Faced with such a pointed, soul-baring question, Nancy was utterly flustered. Her usually gentle younger sister's sudden aggressiveness left her unsettled, making her overlook the fact that she was currently being molested.

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