My wife temporarily returned home to attend a class reunion, so her mother came to Tokyo to take care of household chores and look after me. Though she's in her fifties, she has a stunning, erotic figure with massive 100cm breasts that stand out prominently. With my wife away, her mother came to the city to care for me, leaving us alone together. She's overly enthusiastic in tending to me, swaying her huge, firm breasts as she acts more like she's pampering a lover than helping her son-in-law. Surprisingly, she even joins me in the bath. What's more, she starts massaging and kneading her enormous breasts right in front of me—an act so brazen it pushes me past my limits. Dressed in tight leggings and a braless sheer top, her sexy appearance becomes unbearable. My painfully hard cock erects fully, and before I know it, I charge into her bedroom, launching an unexpected assault.