The Rare Big Sister-in-Law in This World

My mother died when I was very young. From the time I was four until I graduated from middle school, my eldest sister-in-law was the one who looked after me. She always cared for me and took care of me. Once, she even gave me a second chance at life. My second and third older brothers, along with my two older sisters, were all raised by my eldest sister-in-law, who helped them start families and establish themselves. She has the heart of a loving mother. Whenever she can help relatives and friends, she reaches out a hand... This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.