God directs you regarding the inheritance of your children, "To the male shall be as that given to two females. If they are only females and more than two, then they will have two thirds of what is inherited. If there is only one female, then she will have one- half, and to his parents each one of them one sixth of what is inherited if he has children. If he has no children and his parents are the heirs, then to his mother is one third; if he has siblings then to his mother is one sixth. All after a will is carried through or a debt. Your parents and your children, you do not know which is closer to you in benefit, a directive from God, God is Knowledgeable, Wise."
Translation endnotes
[4:11] In this and following verses and from 2:180 we learn that priority is given to the will in the distribution of inheritance. According to these verses, first the debt is paid and the distribution according to the will is fulfilled. This Quranic rule allows the testator and the testatrix to adjust their will depending on specific conditions and needs of the inheritors or other personal issues. For instance, one may leave more inheritance to a daughter whom might be more in need than the others might. The testator or the testatrix might leave more to someone who is sick or handicapped. The Quran, by giving precedence to the will over the default distribution provides flexibility and thus accommodates special circumstances. Unfortunately, unable to comprehend the wisdom behind this divine arrangement, the followers of hadith and sunna have abrogated these verses via hadith fabrications and sectarian rules and thereby have deprived the so-called Muslims from God's mercy.