JUR-899 | NTR Involving a Married Woman: My Wife, Lost in the Muscular Physique of a Student—a Man with More Stamina Than Me—by the Poolside. — Yuki Takeuchi

Every Saturday afternoon, my wife and I work at a swimming program held at the local community center—I serve as an instructor for the adult course, while she teaches children. We’ve been together since our student days, and she has managed to maintain a healthy, toned physique to this day; meanwhile, I’ve found it increasingly difficult to keep my own weight down as the years go by. Perhaps because of this, I ended up spraining my ankle during one of our sessions. My wife stepped in to take over my adult class, but before long, I began to notice something strange about her behavior…