Cersei has royally shafted herself with the Iron Bank....
Season 1 and Tywin was going on about how the crown is 10,000,000 gold in debt. He’s also building them up to be pretty formidable.
In the same season Tyrion tells Bronn that if they didn’t pay, then the bank would end up funding their enemies in one way or another. Enemies we now know to be Dany and/or Jon.
The Iron Bank also know that Dany is hardly going to want to repay 10,000,000 gold if she gets the throne so it’s a catch 22... they’re lending money to the Lannister’s knowing it’s never coming back but they’re keeping them in power.
UNTIL.... Cersei goes and repays the debt in full. Now the Iron Bank has no allegiance to the Lannister’s, Dany can assume the throne without the bank nagging her for a payment they’ll never get.
Cersei would have been better off asking them to fund her until she’s in control of the Seven kingdoms and then repaid. As it stands, I see the bank leaving her high and dry in the near future.
Great video and full explanation here;