Exactly, she expressed her doubt. Although, she didn't just express her doubt, she confronted with her doubt.
verb: question; 3rd person present: questions; past tense: questioned; past participle: questioned; gerund or present participle: questioning
ask questions of (someone), especially in an official context.
"four men were being questioned about the killings"
synonyms: interrogate, cross-examine, cross-question, quiz, catechize; More
feel or express doubt about; raise objections to.
"members had questioned the cost of the scheme"
synonyms: query, call into question, challenge, dispute, cast aspersions on, doubt, suspect, have suspicions about, have reservations about
"she questioned his motives"