How do I respond when people ask if I have brothers or sisters?

Hi everyone, well here goes.

For my entire life I’ve grown up as an only child. For my entire life I have always believed and was told that I never had any siblings.

Then when I was about 21 years old I found out that I had many half sisters and brothers. I am currently 26 years old now.

I have about 9 brothers and sisters in total. (THAT WE KNOW OF)

Those are just the ones that we know about…. There could be more children that my dad fathered but does not know about…. The oldest sister looks like she is in her fifties and my youngest brother is around 7 or 8 years old.

My dad pretty much kept it a secret from me.

This was and still is a very confusing subject for me.

When people ask if I have brothers or sisters, I am honestly unsure how to respond. Sometimes I just say “It’s complicated”. Sometimes I say yes, sometimes I say no.

I very much love both my mother and father but I do not feel so close to my siblings——maybe because I grew up as an only child?

When people ask if I have siblings I honestly just want to say “no” because it is much easier than explaining everything…

My dad is a millionaire and a high ranking decorated officer in the military…. So he travels a lot and also did real estate investing and journalism. My dad is pretty much “The world’s most interesting man” (In a sense….....)..... I don’t know why he fathered so many children…..... From different parts of the world….. Mostly Asian countries and we have a sister in Mexico too…......

I am a professional working actor in Hollywood so I feel very conscious about explaining my private life to people…...

I am also afraid if the media gets a hold of this….. I do not want anyone harassing my family or asking questions. One can say that I still do feel confused and traumatized about the situation….

Is it wrong for me to say that I don’t have siblings? Would that make me a jerk? Even if I grew up as an only child up until 21 ?

I want to keep my personal life private from the media and people…... and even though people like to say they do not judge they still do…..

Thank you for anyone reading this and giving advice, I really appreciate it.