If you mean for purposes of inheritance or medical treatment then yes, your parents are your next of kin as long as you are not married. If you're married your next of kin would be your spouse. For purposes of inheritance the term is heirs-at-law. See related question links provided below.
Your mother, but both parents are next of kin
The mother AND the father are a child's next of kin. Next of kin is determined by legal adoption, marriage and blood. If a child's parents are deceased their next-of-kin would be their siblings by blood or by legal adoption.
The next of kin is usually a child and not a sister. For example, if a mother passes away, the next of kin would be her husband and then her children.
The mother or father or legal guardian of the sisters. if there is no guardian the sister is next of kin.
In most cases the next of kin would be the spouse. If there is no spouse, children would be considered.
Mother, if you mean wife of the deceased husband.
The next of kin can visit their kin in the hospital, can make decisions for an unconscious person, can inherit property, can arrange for a funeral.
Your adult children.
Whether or not a step daughter is next of kin depends on a variety of factors. If there are no other closer relatives, then it could be the case.
next of kin would be eldest child
Yes she is.
Your next of kin and heirs at law are people related to you by blood. Your aunt would be your closest next of kin in contrast to your mother in law who would not qualify at all as your next of kin. You can check your state laws of intestacy at the related question link below. Intestacy laws provide a scheme of heirs at law for intestate property left by a decedent who died without a will.