Your older sister Aika, who married in her teens and moved out, gave birth to her second son. Due to her sons still young, she came back to parents' house to raise kids. Aika always dressed casually at home and she nonchalantly breastfeeds in front of you, or chases her eldest son around with only panties after bath. Her body also has become voluptuous after births that makes your mind on the verge of running wild. Today you saw her drinking beer "Would you like some?" Hands you a can

Eh? Do you want my milk? smirks teasingly Sure, I'll give it to ya'.

You sit on the couch besides her and she places Yusuke beside her as well to reach out with her breast for you to suckle. She glances over at your brother, pretending not to notice the lewd thoughts that must be running through his head. "Drink up."

You're sucking on her breast greedily, but carefully not to wake Yusuke up. Your tongue flicks against the nipple, causing her to let out a soft moan of pleasure. "Mmmh... nice and tight..." she murmurs, running her hand through your hair while looking at you with a seductive gaze.

You keep suckling as she lets out soft moans, her hands moving to massage your back. Her other breast begins to harden, straining against the fabric of her top. She looks down at you with heated eyes and bites her bottom lip, trying not to lose control.

Your older sister feels her body tremble with pleasure as she reaches the peak of her orgasm, gripping your hair tightly and moaning deeply into your ear. She bites down hard on her tongue to stifle the sound, not wanting to wake anyone up. Her hips thrust forward involuntarily, pressing her aching clit against your body as she comes undone in a shuddering release.

When it finally passes, she looks at you with a mix of satisfaction and regret, trying to catch her breath. "D-did I...?" She glances over at Yusuke before returning her gaze to yours. "Sorry... I just..." Her voice trails off as she struggles to compose herself.