Three days passed, and Emma had taken advantage of Alex's absence, who was away on a business trip, to try to put her thoughts in order. This forced break had given her some respite, a chance to reflect on what had happened and what she needed to do next. She knew she had gone too far, and for Nathan, it was imperative to find another solution. She kept repeating to herself that upon Alex's return, she would talk to him, end their arrangement, and regain control of her life.

On the morning of the fourth day, while she was in the kitchen, lost in her thoughts and mentally rehearsing the speech she was about to give him, she jumped at the sound of a familiar voice.

"Hello," said Alex cheerfully from the doorway. "I missed you."

Emma turned around abruptly, her heart pounding. She hadn't heard him come in.

"Uh... hi," she stammered, trying to regain her composure. "We need to talk."

Alex raised an eyebrow, but before she could say anything more, he quickly continued, "Okay, but later. You're three payments behind, so we need to catch up as soon as possible."

Emma felt panic rising within her. "No, wait. We can't continue like this. You can't continue like this."

Alex seemed surprised, almost amused by her words. "Me? I can't continue like this?" he repeated, feigning astonishment.

He took a step towards her, closing the distance between them. "Which one of us proposed this deal in the first place?" he asked, his voice soft but relentless.

Emma opened her mouth to respond, but the words stuck in her throat.

"Which one of us participated without protesting at any moment?" he continued, his tone becoming more insistent as he advanced further.

Coming within inches of her, he finally murmured, "And which one of us came like a slut while I was emptying my balls into HER mouth while talking to HER boyfriend on the phone?"

Alex's words hit Emma like a punch. This last question eroded her resolve, reminding her that she had been complicit in this arrangement from the start.

But this realization only fueled her desire to stop everything. She knew she had to regain control of her life, for herself, but especially for Nathan, whom she loved more than anything.

Gathering all the courage she had left, she looked up at Alex, her voice trembling but determined, "This has to stop. Now. I'll find another way to pay the rent, but we can't continue like this."

Alex didn't just step back after her words. Instead, he kept advancing, reducing the space between him and Emma even more, until his body pinned hers against the kitchen counter. Emma felt the coldness of the counter against her buttocks, while Alex's oppressive proximity made her cheeks flush.

He slightly tilted his head, his eyes locking onto hers with an intensity that made her uncomfortable. "If you're tired of using your mouth," he said in a honeyed tone, a wicked smile stretching his lips, "maybe we can use something else." He placed his hand firmly on Emma's sex. She felt his fingers slip under her dress and probe through the thin fabric of her panties.

Emma felt her throat tighten, unable to respond. The situation was slipping away from her again, and she struggled to keep her calm.

"Or," Alex continued, his tone turning colder, "if you have the money, you can just pay your rent." He pressed harder, bringing his body closer to hers, his gaze still fixed on her.

Emma tried to move, to free herself from this suffocating closeness, but Alex didn't budge, preventing her from moving away. "Or," he resumed, his smile widening, "we can keep our current agreement."

Silence fell over the kitchen, heavy and oppressive. Emma fought against the rising panic. She knew she had to say something, do something to get out of this situation, but the words seemed to escape her.

"Alex..." she began, her voice trembling, "this isn't fair... This isn't..."

Alex didn't respond immediately, simply staring at her in silence, as if to push her into making a decision. Emma felt her heart pounding, the situation becoming increasingly unbearable.

But before she could reply, Alex slightly stepped back, giving her just enough space to breathe, but not enough to feel safe. "I'll give you until the end of the day. Think carefully," he finally said, his tone almost friendly again, but still laden with implications. "I'm sure you'll make the right decision."

Then, without another word, he turned and left the kitchen, leaving Emma alone, breathless and her sex boiling. She placed a trembling hand on the counter to steady herself, trying to regain control of her emotions. She needed to find a solution, and fast.

A few hours later, Emma headed towards Alex's door and knocked softly. With a heavy heart, she had made her decision, though it cost her immensely. When Alex opened the door, she looked at him with determination.

"I've made my decision," she declared with a firm voice. "Can you join me in the kitchen?"

She turned away before he could respond, heading to the kitchen, the room she found the most neutral and least laden with the memories that tormented her. Alex joined her moments later, but before he could say anything, Emma spoke.

"I agree to continue our arrangement until the end of the month," she began, looking him straight in the eyes. "By then, I'll have sorted out my financial situation, and this shouldn't happen again."

She paused but didn't give him time to intervene before continuing, "But I want an adjustment to these... 'payments'. First, they must be spaced at least three days apart. Second, I want it to be less intense, less perverse. Just a quick blowjob, and that's it."

Silence settled between them, heavy and tense. Alex seemed to think long and hard, weighing his words before responding.

"I find that a shame," he finally said, his tone measured, "but I hear your request. I'm willing to take a step towards you with a counter-proposal."

Emma swallowed, feeling a wave of anxiety rise within her. She expected the worst.

"There are about twenty days left," he continued. "Which would come to six or seven payments. I'm willing to reduce that to three payments, thus spacing them out even more and reducing the total number."

A sigh of relief escaped Emma. The prospect of significantly lightening her "debt" offered her an unexpected respite. But this relief was short-lived.

"But in exchange," Alex continued, his eyes gleaming with a calculating light, "I want no limits during the payments."

Emma's heart sank. She felt an oppressive heaviness overwhelm her.

"What... what do you mean by 'no limits'?" she asked, her voice trembling.

Alex approached her, his presence making her even more uncomfortable. "That means I can do what I want, and you can't refuse me anything. You'll be my submissive, my sex slave. In exchange, you'll only have three payments left. But you must commit to setting no conditions."

Emma felt a knot form in her stomach. She was torn. The idea of having only three "payments" to make relieved her, but the total lack of control over what might happen terrified her. She weighed the pros and cons, remembering past events, and despite the fear that enveloped her, she made a decision.

"I accept..." she murmured, her voice barely audible but resolute.

A satisfied smile formed on Alex's face. He approached her again, once more reducing the distance between them. "Perfect," he said in a soft, almost triumphant voice. "It's been three days since I've waited for this payment, so I want the first one now."

The weight of Alex's words fell on Emma like a lead weight. She knew she had just committed to something far darker than she had imagined, but there was no turning back now. She prepared herself mentally, trying to gather what little courage she had left.

Emma could see his perversity in his gaze, and her own desire only intensified.

"Get on your knees, slut. I want you to suck me like you did when I was on the phone with your boyfriend. Don't hold back, I want you to take every inch of my cock in your mouth."

Emma's mouth opened as she knelt down, Alex didn't waste time and placed his cock in front of Emma.

Alex: "I want to see the real Emma, the one who loves to suck my cock."

Emma extended her tongue and ran it along the length of Alex's hard cock before taking him into her mouth. She could feel his hands tightening in her hair as she took him deeper, her lips stretching to accommodate him.

Alex's breathing became heavier as she exercised her oral skills, his moans of pleasure sending shivers down her spine. For Emma, there was nothing more exhilarating than being completely at the mercy of her lover.

Alex: "I want you to touch yourself like during my call with Nathan."

As she continued to suck, one of Emma's hands began to wander, slipping under her dress until it reached the perfect spot between her thighs. Emma gasped when her fingers entered her, sending waves of pleasure through her body.

Suddenly, Alex pulled on her hair to stop her fellatio, lifted her, and sat her on the kitchen counter. "Spread your legs, slut. I want to fuck you here."

Emma's heart raced as she spread her legs, her body trembling with anticipation. Alex lifted her skirt, moved her panties aside, and thrust into her, his cock filling her completely as she screamed in pleasure.

For the next hour, Emma was completely at Alex's mercy, no longer holding back her cries of pleasure as he fucked her relentlessly. First on the kitchen counter, then on the table, where she found herself face down, Alex firmly holding her wrists behind her back. In this position, she was offering herself in perfect submission to him.

Alex, his voice hoarse with desire, murmured, "I've been dreaming of fucking you like this for so long."

She lost all sense of time, her mind consumed by the raw, primal pleasure of the situation. None of her boyfriends, and certainly not the very gentle Nathan, had ever fucked her like this. Alex clearly had remarkable stamina, for she reached three powerful orgasms during that hour.

At the end, Alex firmly grabbed Emma's beautiful red hair, eliciting a moan of pleasure from her, and increased the pace of his thrusts against her magnificent ass.

Alex managed to articulate: "Beg me to cum inside you, slut!"

Emma, in a daze: "Ahh yes, cum inside me, I'm your slut."

These words were enough for Alex, and with one final thrust where he buried himself completely in Emma's sex, he finally had his liberating orgasm.

He gently released Emma's hair, who collapsed weakly against the kitchen table, her body heavy with exhaustion.

They both remained frozen in that position, struggling to catch their breath. Droplets of sweat beaded on Emma's face, sliding down her delicate features, while her damp red locks clung to her skin, enhancing the sensuality of her appearance.

Alex, breathless, gave a satisfied smile. "I'm pleased with this new agreement," he murmured before pulling out, adding a light slap on Emma's buttocks. "The next payment will be in a week. Rest well."

Without looking back, he left her there, immobile, and returned to his room. Emma remained lying there, exhausted, unable to move. It took her a good ten minutes to finally get up. Staggering to her bed, she collapsed into it, falling asleep in moments, exhausted by what she had just experienced.