I found and article about Emilia’s reaction to the decision Daenerys made in Game of Thrones 4×4 ‘Oathkeeper’.
You can read a part of it below and the complete article here.

Daenerys Targaryen had to make a tough decision in last night’s episode of Game of Thrones, “Oathkeeper.” As the episode’s preview synopsis said, she had to choose between justice and mercy. She chose the former, despite Barrister Selmy’s urging her to choose the latter. In a video released by HBO, Emilia Clarke and Ian McElhinney, the actors who play Dany and Selmy respectively, discuss Dany’s decision. Clarke doesn’t seem to believe that Dany made the right one.

“The crucifixion of the children has struck a chord in her that has clouded any sort of helpful leadership values she may have,” says Clarke. “She spends so much of her time ignoring the innate femininity that’s within her and spends so much time being a strong woman within a man’s world that I think that she convinces herself that what she’s doing in what any commander would do, but actually it’s not what a good leader would do.”