For now, he needs to listen. This is going to take some work, because he is so invested in preserving an image of himself as not being a “sleazebag” (as he puts it) that he feels compelled to justify himself and his actions. He sees how bad she feels, but it makes him feel bad about himself (shame), which prevents him from feeling bad for her (guilt).
The shift from shame to guilt is crucial. Shame is a state of self-absorption, while guilt is an empathic, relational response, inspired by the hurt you have caused another. We know from trauma that healing begins when perpetrators acknowledge their wrongdoing. Often, when one partner insists that they don’t yet feel acknowledged, even as the one who hurt them insists they feel terrible, it is because the response is still more shame than guilt, and therefore self-focused. In the aftermath of betrayal, authentic guilt, leading to remorse, is an essential repair tool. A sincere apology signals a care for and commitment to the relationship, a sharing of the burden of suffering, and a restoration of the balance of power.5