at first , she had just been enthralled by the freedom of being outside in the night air , an al fresco rebellion away from her parents , and vince had thought that as the instrument that had brought about this liberty he would only have to wait a short time before she succumbed to his ethereal charms and yielded herself to his more earthly needs , but more recently she had become increasingly restive , nervy , like a domestic animal awaiting slaughter , critical of his assumed leadership , quick to mock his pantomime rituals and pseudo black magic ceremonies .