That's why last time I bought Cebu-Pacific without luggage and without insurance for my maid. I also met your problem finding that Tigers operate flights to Clarke, although which is near to Manila. But to avoid arguing with the maid, I chose Cebu ticket to Manila.
Your bunbun should have lied to you. Clarke is a famous airport and also a tourist place. But she has the right to insist a ticket to Manila, not Clarke