Clarification for Secret warehouse
Yes, she can.

The game's creator weighs in a few posts down at this BGG thread


  Secret Warehouse &amp; Black Market depend of your resource icons present
  on your "board"
  
  So if you have a STONE or CLAY brown card (and nothing else) :
  
  
  SW can produce either a STONE or a CLAY
  BM can't produce neither a Stone or a CLAY (none of them)
  
  
  SW &amp; BM don't depend on the use you make of the resources on turn T,
  it depend on what resource are present on your brown cards.