NFD-035 - Real-life middle-aged couple life, Part 8: The fulfilling sex lives of 3 couples

Ruby fans, are you having proper nighttime sexual lives? The secret to longevity lies in sex! This time, we introduce the sex lives of three mature couples. Including remarried couples, couples who live harmoniously (oshidori), and couples who married childhood friends, they have loved each other for decades... They talked about and demonstrated their usual marital relations. Please enjoy the fulfilling sex lives of three amateur couples in detail.