A hot spring trip for just the two of them, a busty, beautiful mother and her son. As puberty approaches, the son is curious about his mother's big breasts. "Can I be your baby?" the son asks, groping and sucking on her breasts in a private hot spring. His son's "breast play" makes the mother let out a sweet sigh. The son is also excited and gets a hard erection, and the mother gently wraps her bewildered son in her mouth. The son, having experienced pleasure for the first time, ends up inserting his penis into his mother's pussy and even cumming inside her raw.