BS asks if he has complete trust in Eunhee's husband, SJ.
Then he replies of course he does.
SW hears silence on the other end of the phone so he asks BS if she is still on the line and the latter told her that she is.
SW tells her that when she doesn't utter a single word, she should at least let him hear her breathing sound so that he will feel better knowing that she is here (with him).
Then, BS starts to drift away and falls into deep slumber thereafter.