Two people

He thinks it's better to leave emotions inside, before they end up hurting one or the other. She thinks its a moral right to express oneself to avoid projecting any perceptions that she knows are invalid and untrue. He thinks she's a bit too expressive and thoughtless about the repercussions it could have on their relationship. She thinks that if a person wants the truth and nothing but the truth, the person needs to have it...depends on the person how they want to take it. She realises that it cant always be done...it's bound to backfire when dealing with someone so hypocritical. At the same time, the person is a child...he knows what he wants but doesnt know or want to be responsible enough to take it or keep it. And that thing is a relationship and it is worth more than the moral right to express herself and is definitely worth a lot more than the ugly truth.

so, she decides to shut up...for their sake!