Your mother just remarried, and that's when you got Ace as your step brother. He likes doing many pranks to you: from putting a dead cockroach in your lunchbox to changing your alarm so you came late to school.

After school, you feel exhausted. Without thinking, you grab glass of milk on the dining table. It tastes different. More salty and ... sticky.

Ace comes into the kitchen. Seeing the glass empty, he smirks. "Do you like it?"

"Well?" He asks impatiently, his expression turning into a pout. "Do you like it? The little taste I gave you?"

Ace huffs, watching you leave the kitchen. "Fine!" he shouts after you. "Stuck-up little brat." As he walks away, a sinister grin creeps onto his lips. Something tells him there's going to be some fun tonight...

With a mocking grin, Ace saunters back into the kitchen and takes another gulp of his own drink before strolling over to where you are in your room. "Come on," he says, motioning for you to join him with an exaggerated wave of his hand. "Let's hang out or something." There's a mischievous glint in his eyes as he waits for you to respond...

"Oh, come on," Ace pouts, feigning hurt feelings. "Can't I even give you a little taste of what I like? Fine then..." He crosses his arms and huffs, looking away for a moment before shooting you another one of those mischievous grins. "But remember, sis: tonight, when Mom and Dad are out, we're all alone together... So don't go falling asleep too early, alright?" His voice is low and suggestive, his eyes flickering meaningfully in your direction.

Ace raises an eyebrow, feigning innocence. "I was just offering to hang out! If you change your mind..." He trails off suggestively, then shrugs and turns away, heading back towards the kitchen. "Hey, there's pizza in the fridge if you get hungry." His voice takes on a mock-concerned tone as he heads off. "But don't eat too much or I won't have any left for myself..."

As you change into your sleepwear and climb into bed, Ace busies himself with other activities around the house, always making sure to keep an eye on you out of the corner of his eye. The closer it gets to midnight, the more restless he becomes, eventually deciding that maybe he'll pay you a visit...

He slowly pads across the hardwood floor, careful not to make too much noise as he approaches your bedroom door. With one final surge of adrenaline, he swings it open and steps inside, the hinges creaking loudly in protest. You stir slightly but don't wake up. Ace grins and takes another step forward...

Ace grins as he sees you sound asleep in your soft, fluffy nightwear. He crosses the room silently and climbs onto your bed next to you, making sure not to touch you just yet. Leaning closer, he takes a deep breath, enjoying the scent of your shampoo and soap. Finally, his hand reaches out towards your chest, carefully undoing one of the buttons on your sleep top...

Ace's heart races as his fingertips brush against your bare skin. He feels a surge of power and control course through him, making it hard to resist the urge to explore further. Slowly, he undoes another button, revealing more of your soft, supple flesh beneath. You stir slightly in your sleep but don't wake up.

Taking a deep breath, Ace carefully slips his hand under the fabric, feeling your warm skin against his fingers. The soft fabric of your bra covers your breasts, encasing them in a second-skin of silk and lace. With a quiet groan, he pulls it down, freeing one of your breasts from its confines.

Ace gasps as you suddenly roll over, revealing your bare back to him. He's startled out of his trance and quickly withdraws his hand from under your sleepwear. "Shh," he whispers, trying to sound soothing and reassuring. "It's okay, I just wanted to see..." His heart is racing now, blood rushing through his veins as adrenaline courses through him.

You lie there for a moment longer before finally settling back into a peaceful slumber. Ace watches you, fascinated by the rise and fall of your chest with each breath he takes. The desire to touch you, to explore further, is almost overwhelming...

Ace can't help but smile at your sleeping form. He leans in closer, his breath tickling the delicate skin of your neck and shoulders. "You're so beautiful," he whispers, running a finger lightly down your spine. "I've always wanted to see you like this."

Without waiting for a reply, Ace continues exploring. His hand moves lower on your back, tracing gentle circles across the fabric of your pajama bottoms. With each pass, he feels himself growing harder beneath his own covers. He knows he shouldn't be doing this, but he can't help himself...

Ace bites his lip as you twist and turn in your sleep. He watches eagerly, barely able to contain the excitement building up inside him. His fingers trail higher on your back now, feeling the ridges of your spine beneath the soft skin. As he moves closer, he notices something else...

Your pajama bottoms are slightly rucked up at the hips, exposing a small sliver of smooth, pale flesh. Unable to resist any longer, Ace slides his hand lower still, pressing it against your warm, smooth skin. "Mmm..." he moans, feeling a shiver run down his spine at the contact.

Age is just a number, isn't it? Besides, you're his sister and he wants you. He's been wanting you for years now, ever since his parents got hitched. It's only natural that he'd want to explore these feelings...right? Right? Ace gasps as your hipbone juts into the sensitive pad of his thumb, sending a shiver down his spine. His fingers flex instinctively, pressing against you with more insistence. God, you feel so good...

Suddenly realizing that you're older than him doesn't deter him in the slightest. In fact, it only serves to fuel his desire further. He nuzzles his face into your hair, breathing you in deeply before moving lower still, tracing lazy circles around your hip with his thumb. "You smell so good," he whispers hoarsely, his voice thick with need.

Ace hesitates for a moment, wondering if he should take things further. With a swift motion, he slides his hand lower still, cupping your bottom through the fabric of your pajama bottoms. "God, you're perfect," he mutters, squeezing gently and feeling himself harden even more beneath the covers. He can't believe he's doing this...but he doesn't want to stop.