My niece Ruka, whom I hadn't seen for years, had grown up so much that I thought she was all grown up. But then she said, "Let's take a bath together like we used to!" with a cute request. She's still such a child... As I was soaking in the nostalgia, she appeared with a bust that was so developed it was unbelievable, no, it was a massive bust! And her huge butt was no less impressive! My son also grew rapidly alongside my niece's growth! "This is the first time I've seen something this big..." Me too!!! I kneaded the overflowing breasts with both hands, performed paizuri that swallowed everything, rode her thick, large buttocks in a cowgirl position, and enjoyed a thorough bath sex! Each time she came, I pistoned my hips in a frenzy, driven by her divine body that increased the pressure of her vagina. "I'm going to cum like this..." She tightly clamped down with a crab-like grip, inducing continuous internal ejaculations! Not a single drop was wasted, and she held the position that ensured conception, my favorite hold!