This study aimed to describe the experiences of grand multiparas who chose to accept unexpected new pregnancies, give birth, and raise their newborns. Semi-structured interviews were conducted with specified expectant mothers at X Hospital and analyzed using a phenomenological approach. The seven participants were anticipating their fourth or subsequent childbirth and faced challenges such as being unmarried, lacking support, and experiencing financial difficulties. Based on the narratives, three themes were identified. The grand multiparas participants perceived their experience of “actual pregnancy under unintended circumstances with possibilities of pregnancy” as resulting from the “emotional stability and trust gained from partners” and their “valuing of mutually sought-after sexual relations.” They readily accepted the “new life” without hesitation. They felt “encouraged to give birth” by receiving “blessings for the new life from loved ones” and by “genuinely affirming own motherhood.” For grand multiparas, giving birth and raising a child meant “living with someone irreplaceable,” “becoming someone irreplaceable,” and “maintaining a relationship with someone irreplaceable.”