SUSPICIOUS

[adjective]She told her lover that she thought her husband was starting to get suspicious (= to think that something was wrong).His colleagues became suspicious (= thought that there was something wrong) when he did not appear at work, since he was always punctual.Her parents have become suspicious about her behaviour.They are deeply suspicious of one another/of each other's motives.I'm highly suspicious of the findings of this survey.My mother has a very suspicious nature (= does not trust people).