Trip (someone's) wire
Translation of "trip (someone's) wire" into Russian
trip (someone's) wire
спровоцировать (кого-то)
Be careful with your comments, you might trip her wire.
Будь осторожен с комментариями, ты можешь её спровоцировать.
Definitions
To trigger someone's hidden defenses, anger, or emotional reaction, often unintentionally, by saying or doing something that sets them off, similar to setting off a tripwire that activates a trap.