求翻译：继母不懂得珍惜她，因为她还有自己的两个亲生的女儿需要珍惜。她是母亲，她有母爱，但是她的母爱过于自私了，全部的爱都在了亲生的女儿身上。是什么意思？

Stepmother does not know how to cherish her, because she also has her own two daughters of their own need to cherish. She is the mother, she has a mother's love, but her mother was too selfish, full of love in both of their daughters.