yes, children through adoption are legally the same as children by birth.
Yes. The next of kin has adopted many children.
The grandmother, the grandmother's cousin, and your mother are of the same generation (first cousins). You are of the next generation and second cousin to the someone's parent. You and the someone are second cousins once removed.
Typically the state foster care system.
Your adult children.
next to their mother
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.
If he is still alive, your grandfather is the legal next of kin to your grandmother. Failing that, her children are her next of kin. Does she have living siblings? Those are also closer kin than her grandchildren. Failing that, it gets more complicated. We all have different families with different relatives.
No you do not. The next person in the list on your Grandmother's trust document steps in as the successor trustee. Powers of attorney are invalid once the principal has died. Your mother's Power of Attorney (which has expired) has nothing to do with your Grandmother's trust.
The next of kin of a deceased person aged 62 when their mother is 92 would typically be their own children, if they have any. If the deceased has no children or if they have predeceased them, then it would likely be their siblings, nieces or nephews, or other close relatives. Ultimately, the designation of next of kin can vary depending on the specific circumstances and legal regulations in the jurisdiction.
In most cases the next of kin would be the spouse. If there is no spouse, children would be considered.
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.
If they have a biological relative then no, a brother is a closer relative than an adoptive father is. Legally though, if you are the only guardian/ relative then you will be next of kin.