[psykovsky]

You haven't wondered very much, I guess, or you would've cleared your doubts by now.

From wikipedia, after a 5 sec search:

   Bigelow was born in San Carlos, California,
 the only child of Gertrude Kathryn (née Larson; 1917–1994),
 a librarian, and Ronald Elliot Bigelow (1915–1992),
 a paint factory manager.

https://en.wikipedia.org/wiki/Kathryn_Bigelow#Early_life_and...

[pessimizer]

That two of the people most closely related to her are not Robert Bigelow of Bigelow Aerospace is not in any way evidence that she is not related to Robert Bigelow of Bigelow Aerospace.

Never heard of the conspiracy theory or Bigelow Aerospace, just about how logic works.