your grand niece or nephew in-law (-Kasadie)
It depends on the laws in your specific location. In many places, there are laws that govern the age of consent, which can impact whether a relationship between a 16 and 18 year old is legal. It is important to understand the laws in your area to ensure that the relationship is lawful.
Legally, the next of kin is typically determined by the nearest blood relative, so in this case the half sister would likely be considered next of kin before a nephew. However, laws can vary by jurisdiction, so it's important to consult with a legal professional for specific advice.
Inheritance laws vary by jurisdiction, but in many places, a daughter-in-law can inherit property from her spouse or other family members if they are named as beneficiaries in a will or if the law allows for it. It is important to consult with a legal professional to understand the specific inheritance laws that apply in the relevant location.
Laws are rules established by a state to govern society, so the relationship between law and the state is essential. The state creates, enforces, and interprets laws to maintain order and regulate behavior within its jurisdiction. Laws provide the framework for the state to carry out its functions and protect the rights of its citizens.
The legal age to be in a relationship varies by location, so it's important to check the laws in your specific area. In some places, the age of consent is 18, meaning that being in a relationship with a 17-year-old could be considered illegal. It's always best to ensure that any relationship complies with local laws and regulations.
In the United States there are no "legal relationship" between relatives, because no laws define these relationship. These are all customary terms. The child of one's niece or nephew is one's great niece (if a girl) or great nephew (if a boy). The elder relative is a great aunt or great uncle.
You aren't. You do not share a common ancestor.
Since it would be your sister who had the child with her husband (your brother-in-law) then that would make their child your niece or nephew.
There would be no relationship as you do not share a common ancestor. If your brother-in-law is married to your sister, then her daughter is your niece, her husband would be referred to as your niece's husband.
Generally, the niece and nephew would be the heirs at law under the laws of intestacy. You can check your state laws at the related question link below.
You would be her aunt. She would be your niece.
Nothing, you are not related, unless the baby is your sister's baby as well, in which case they would be your niece or nephew.
If your brother-in-law's daughter is by your sister, she is your niece. If your brother-in-law's daughter is by someone else, she is genealogically not in your family tree.
Your daughter-in-laws sister. There is no relationship as you do not share a common ancestor.
If you they are also the son of your brother, he would be your nephew. Otherwise, there is no direct relationship, though referring to him as nephew (and you as aunt/uncle) would be the standard in most families.
Nothing. Your niece in law. Your brother in laws niece.
Is your wife the mother of your daughter? If not, the two are not related and could get married. If she is the mother of your daughter, or has adopted her, she would be considered a first cousin. In many places, they could get married without any problem, but check your local laws as some places do not allow first cousins to marry.