All Chapters of Sinful Obsession: My Billionaire Stepbrother : Chapter 21 - Chapter 30

164 Chapters

The Youngest Professor in Law

~Isabel~ The afternoon sun beat down on the campus courtyard, reflecting off the glass windows of the Law library. Chloe and I were practically power-walking toward the administration wing. We had just survived a grueling three-hour lecture on Law Ethics, but the real mission was only beginning: securing a spot in the Corporate Law elective. “I’m telling you, Izy, if we don’t get into this section, our entire semester is ruined,” Chloe panted, clutching her registration forms like they were golden tickets. “Is it really that hard to get into?” I asked, adjusting the strap of my bag. My mind was still a little foggy, a lingering side effect of the kiss in William’s study the night before. Every time I blinked, the memory came back to haunt me, but I needed to focus on school, not the guy who was technically my stepbrother. “It’s not just about the workload, Isabel,” Chloe said, her voice dropping to a conspiratorial whisper. “It’s about the professor. Alister Thorne.” We finally m

Already Crossed the Line

~Isabel~ I spent the rest of the afternoon with Chloe in the library, but I wasn’t really reading about Law Ethics. My mind was stuck on that text message from William earlier. A simple “What's up?” I had been looking for him the other day to talk about moving my internship to the corporate department, so I texted to ask where he was since I hadn’t seen him around the mansion. He had replied almost immediately that he was at the gym. It shouldn’t have surprised me. Nobody gets shoulders that broad and muscles that lean just by sitting behind a desk. I kept picturing him in that humid gym air, biceps straining under heavy weights, and honestly, the image was doing things to my heart rate that were definitely not helpful for studying. He looked amazing in a suit, like he was born to run the world, but in a simple gym tee? That was a whole different kind of danger. By the time I got back to the mansion and finished some extra reading in my room, the sun had long since set. I was starv

Sweet Sweet Dream

~Isabel~ I lay staring at the ceiling, shadows of tree branches twisting across the wall. My heart was still fluttering like a trapped bird. Why did he have to be so handsome? It felt like the universe was playing a cruel joke on me. He was a bully. Arrogant. Half the time he opened his mouth I wanted to scream right in his face. But then there was the other half. The way he looked in that plain black tee. The smell of him, rich and warm and entirely his. The way his eyes traced every inch of me across the dinner table like he owned every part. He was my stepbrother, for heaven’s sake! Even thinking the word made my stomach twist, half sick with guilt, half burning with something dark and hungry I had no business feeling. Thinking about him like this, imagining all the things I wanted him to do, was so wrong it made my skin prickle. But my mind was a traitor. Every time I closed my eyes I wasn’t thinking about Corporate Law or my tuition or why I was even here fighting for this de

I wanted her

~William~ I stood outside her door for a long minute, staring at the tray in my hands. A glass of milk and a plate of cookies. My father had noticed she barely touched her dinner, and in his usual way of pushing everyone together like we were one big happy family now, he had suggested I bring something up to her. I should have told him no. I should have handed the tray to a maid and walked away. But instead, here I was. I pushed the door open quietly. The room was dim, lit only by moonlight filtering through the curtains. I walked over to the nightstand to set the tray down, but my eyes drifted straight to her. Isabel was fast asleep, her hair spread out across the white silk pillow like dark spilled ink. She looked so peaceful, breathing slow and even, all the sharp edges of her face softened by rest. Awake, she was all fire and sharp words and stubborn glares. Asleep, she looked innocent. And God, she was beautiful. My eyes traced the line of her jaw, the way her lashes c

Must be A Dream

~Isabel~ Morning light hit me like a slap through the curtains. I groaned and buried my face in the pillow, but when I shifted, something stopped me. My body felt different. Sensitive. A soft relaxing warmth lingered in my veins, and then it all came rushing back. William. Here. In my room. His hands on me. I shot upright, my heart beating so hard I could feel it in my ears. My eyes snapped to the nightstand. There sat a glass of milk and a plate of cookies, cold and completely untouched. My breath caught. It wasn’t a dream? It had to be. The way he touched me, the heat of his skin, the way I’d practically begged for more… it was too vivid, too real to be anything but a fantasy my own starved brain had cooked up. I dragged my hands over my face, heat crawling up my neck and burning my cheeks. "Get a grip, Isabel," I whispered to the empty room. I shouldn’t be dreaming like that. Not about him. Not about my stepbrother. I’d never felt anything close to this pull before. Back i

Invited to the Party

~Isabel~ "No I haven't. And you're Marcus," Chloe blurted out before he could even open his mouth. He froze, his hand still reaching for the frisbee on the grass. He blinked, clearly caught off guard, but then that slow lopsided grin returned, wider than before. He straightened up, tucking the plastic disc under his arm, and looked at Chloe with equal parts shock and genuine amusement. "Well," he laughed, his voice warm and easy. "I guess I don't need to introduce myself then. I was literally about to say my name is Marcus, but you beat me to it." I shot Chloe a look only best friends understand. Half 'go get him girl' and half 'wow you really did your research'. I nudged her gently with my elbow, hoping she would keep the momentum going. After the night I’d had, watching someone else’s romance unfold felt like the breath of fresh air I badly needed. Marcus chuckled, rubbing the back of his neck as he looked right at her. "It’s good to know I’m not the only one eager to find out w

When he doesn't fight...

~Isabel~ It was strange. I had spent so much time wishing William would just leave me alone, but once he actually vanished from the house entirely, the silence grew deafening. I never saw him at breakfast. His chair sat empty at dinner. The door to his study stayed shut all day. Part of me wondered if he was avoiding me because of that night, or if he had simply decided he was done with me for good. By Friday I could not stand being inside those walls another minute. I headed straight to the office, my mind set on one thing only: my future. If I was going to survive this internship, I needed to be where the real work happened. I needed the legal department. When I walked into Sterling Global headquarters, the glass tower felt even more imposing than usual. I checked my reflection in the lobby mirror, straightening my blazer. Today was not about filing papers. Today I was going to ask for exactly what I needed to build my career. When I stepped off the elevator on the fiftieth flo

Loudest in the room...

~Isabel~ I sank into my chair and stretched my back. The air in the open-plan office felt stiff even though the air conditioning was running steady. I felt hot and worn out, and no matter how many times I told myself to focus on the stack of folders Sophia had dumped on my desk, my mind kept drifting back to his office. To him. To the fact that he hadn’t argued. William Sterling had been calm, and somehow that calmness felt far more terrifying than his cold silence ever had. I pulled a pile of tedious administrative files toward me, the kind of mindless entry and filing work Sophia always found to keep me busy. But today I couldn’t even focus on that. By three o’clock my brain was a mess. I needed caffeine. I headed to the breakroom, but before I could even reach for a stir stick, Jax appeared right beside me, leaning against the counter with a grin. "Hey Mayfield. Welcome back to the land of the living," he teased. "How’s the day treating you?" "It’s intense," I admitted, stir

...held in a tight position ...

~Isabel~ The office finally went quiet as the clock inched toward closing time. I was already daydreaming about which heels wouldn’t leave my feet dead by midnight tomorrow when my desk phone rang. "My office. Now." William’s voice was short, no warmth left at all. I rolled my eyes so hard it almost hurt, smoothed my skirt, and dragged myself toward the executive suite. When I walked in, he didn’t even glance up. He was hunched over a mess of blueprints, sleeves rolled up, forearms all tense and worked up. Just like Jax said, completely buried in work. "You needed me?" I asked, hovering by the door. "You’re coming in tomorrow," he said, finally straightening up. No heat, no nothin, just that annoying, too-professional look. "There’s work that needs doing." I blinked like an idiot. "What work? Tomorrow is Saturday, William. The weekend. The part of the week where normal people sleep in and have fun." He huffed a dry laugh that didn’t reach his eyes, then circled the desk, stop

Unexpected warmth

~Isabel~ I clocked into Sterling Global at 7:30 AM. My footsteps echoed loud through the empty lobby. The only other souls around were the maintenance crew, and I swear the guy buffing the floors side-eyed me like I had lost my entire mind. Who voluntarily shows up to work on a Saturday? If it wasn’t for my scheming stepbrother and that big mouth of mine promising the press a three-month deadline, I’d be curled up at home right now. Probably facemask on, bath running, mentally picking out which outfit would make everyone at the party jealous. Instead here I was, ready to run on black coffee and pure stubbornness, determined to prove I was not the charity case William kept painting me as. I’d left the mansion a whole hour early and took a cab on purpose. No way was I giving him the satisfaction of playing the generous chauffeur. I wanted to be already buried under paperwork when he walked in. A silent middle finger wrapped up in hard work. But when he finally showed up at 8:30

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