She was continually tormented at the same time by remorse for having deserted Mitya, and in moments of discord and violent anger (and they were numerous) she told Ivan so plainly. This was what he had called to Alyosha “lies upon lies.” There was, of course, much that was false in it, and that angered Ivan more than anything. … But of all this later.
He did, in fact, for a time almost forget Smerdyakov’s existence, and yet, a fortnight after his first visit to him, he began to be haunted by the same strange thoughts as before. It’s enough to say that he was continually asking himself, why was it that on that last night in Fyodor Pavlovitch’s house he had crept out on to the stairs like a thief and listened to hear what his father was doing below? Why had he recalled that afterwards with repulsion? Why next morning, had he been suddenly so depressed on the journey? Why, as he reached Moscow, had he said to himself, “I am a scoundrel”? And now he almost fancied that these tormenting thoughts would make him even forget Katerina Ivanovna, so completely did they take possession of him again. It was just after fancying this, that he met Alyosha in the street. He stopped him at once, and put a question to him: