"Are you a dom" baby where have you been???

We (and the MC) knew that he was a sadist (S) ( = want to inflict pain to the masochist), but not that he was a dom (D) ( = want to dominate, the life of his sub).
They were into s/m plays (sadist/masochist), but definitely not in a D/S (dom/sub) relationship, wich has much consequences.

That wasn't the deal and nothing until then show that the MC being dominated. To this point he just like pain and restriction (and only during plays).