Returning home to my parents' house after a long time, I was already exhausted by the mess and my own lazy routine. That's when my perpetually slovenly sister suddenly showed up, leaving us completely alone together. Flaunting her big tits, she barged into my room, stripped off my pants without a word, and started licking the tip of my cock like it was a piece of candy. Mocking my reactions, she stuffed my dick into her mouth and sucked hard with vacuum-like blowjob techniques, draining every drop of cum and swallowing it all. Far from stopping after just one round, she milked me dry with handjob-as-if-nursing and an artificial pussy. Every night became an endless sex marathon. Naturally, I got dick-sucked repeatedly, sucked greedily on my sweaty sister's tits, and got titty-fucked with her massive, sweat-soaked breasts. Delighted by my hard-on, she straddled me in cowgirl position, riding hard and deep. Her tight, pulsating pussy couldn't resist clenching around my cock, and I erupted inside her with a creampie. Our sibling relationship grew increasingly intense, fueled by her laziness and boldness, making each daily encounter even more passionate.