Arthur then waited a few seconds to get Isla's reply. He expected her to simply be very disappointed or scold him even more and he was ready to take it. There was really no excuse for his actions except selfish anger and lack of composure.
However, one thing Arthur could say was that he didn't regret what he did one single bit. If he was put in the past, he would do it all over again. After all, this was an integral part of his morals. His loved ones were a red line and if someone could cross that red line without any consequences then what was the point of Arthur trying to get stronger and better?
These moments were the reason Arthur was trying so hard to be stronger. Fame and wealth didn't matter to him as much as these things mattered to him.