Bit of background info:
My DM had me at a young age, my bio father was the same age. There was no relationship between them after DM discovered she was pregnant. DM told me that my bio fathers family went "ballistic" and they moved within weeks of finding out my DM was pregnant. DM family were very supportive regardless of the fact that they were quite strict and it was the mid 70's (so young SP not very acceptable at the time)
My DM later met and married my (now) DF who incidently is a cousin of my bio Father (I know what you're thinking!) and I have never really had any concerns or interest regarding my bio father, any questions I ever had were answered honestly.
My current dilemma is that my bio Father has 3 DC (2 DS and 1 DD) and I don't know if they even know about me or not. The DD has just sent me a request on FB. I am FB friends with a lot of her cousins who are also my cousins (step-cousins I should say). I don't know whether I should;
1- Accept the request and just leave it at that, see if she then makes any further contact.
2- Ignore her request as she might just be requesting me as a friend because we have a lot of "mutual" friends on FB.
So opinions please. What would you do?