Is it Fraternization if the individuals involved are not dating, but are blood relatives?

I will give you a sticky example of an instance where it became an issue in one of my units. I had a CPL in my S3 shop whose mother was a full bird Colonel in the Medical BDE. She was about 27, unmarried and she had a room in the barracks but she pretty much still lived with her mother. Every time we got ready to go to the field she would show up with a no field duty profile or an emergency leave for the death of a loved one with Red Cross notification. It took me about six months to figure out that something was fishy with this CPL never going to the field. I took my suspicions to my Major who was aware her mother was a Colonel while I was unaware. I told the Major I was going to build a case for dereliction of duty and malingering on this CPL. She advised me to say nothing to anyone and keep it on the quiet. So our next deployment she shows up again with a Red Cross emergency leave request for the death of her grandmother. I had been keeping every copy of every profile and leave request she had. When I looked through her records she had already taken an emergency leave on the death of that grandmother 18 months earlier. I made copies of her whole packet and took them home with me. The next day I brought the evidence to my Major and she asked to keep and look at the file. Two days later I asked my Major how to proceed and she said either she had lost the folder or someone had stole it off her desk. What a coincidence huh. I told my major I thought I could find a copy at the company 1SGs office. Which I did and gave that to my Major asking her to secure it better. The next day it also disappeared from her desk. At that point I was very upset and told my Major I wanted to use the BN CDR's open door policy to address this problem. She got pissed and made vague threats. That just about sent me through the roof so I went straight to my BN SGMs office and aired the whole thing with first him, then the BN CDR. The next Monday I had Field Grade Art 15 charges on the CPL for lying, forging documents and a few other things. I suspect The CPL's mother and my Major were friends and my Major was trying to protect the CPL. I guess it all turned out well in the end. I would say this was more undue officer influence rather than fraternization, but it still had bad outcome and God only knows how long that CPL had been pulling the wool over other peoples eyes before I showed up.

If one is not in chain of command and cannot influence the others military career. Then I say leave it alone. It is when ones relative is too close to the COC that things go wrong.

Was in the same company as a guy whose uncle was the SMA when I was stationed at Drum. They would have dinner or whatever after duty hours and meet off post. Soldier was treated just like everyone else. Most didn't even know it was his uncle.

Family is not fraternization, IMHO.