He then, with great presence of mind, put a stop to any further recriminations by kissing her; and his indignant betrothed, apparently feeling that he was too deeply sunk in depravity to be reclaimable, abandoned {for the time being, at all events} any further attempt to bring him to a sense of his iniquity.
In the scene described, the protagonist demonstrates remarkable composure as he halts the escalating accusations from his betrothed. Instead of engaging in a heated argument, he chooses to kiss her, which surprises the situation and shifts the focus away from their conflict.
This unexpected action leaves his fiancée feeling disillusioned with him, as she perceives him to be beyond redemption. Consequently, she decides to refrain from further attempts to address his perceived failings, at least for the moment, indicating a temporary suspension of her indignation.
