How could you do this to me?

The first "could" seems a counterfactual connotation, while the second is a hypothetical or counterfactual connotation.
Do you think the 3rd "could" in 2 is same as the first or the second?

1. If I could fly like a bird, I could fly to you.
2. (To a friend who betrayed me, and who has never been thought to do so) - How could you do this to me?(surprise or disbelief for the present situation)

I think there's a message in 5jj's 'like'. Think about it. ;-)

b

Is this a zen riddle?