Mina had explained to Rebecca her reasoning behind asking her to express regret toward Dom. She was not asking the woman to apologize for calling him an idiot after he blatantly asked to sleep with her, but she was telling the woman to explain how she felt, and to phrase it in such a way that it made it appear as though she were apologizing.
It did not take long for Rebecca to catch on to what Mina meant. The woman was teaching her how to mask her displeasure within her words which would help the other party understand what had triggered her anger, while also sounding remorseful for her outburst. It was not a sincere apology, but Mina told Rebecca that knowing the appropriate time to apologize would come with time.
