Hahaha, no, she isn't that irrational. Just in a bad mood. But at the moment she's just being short with Tom, not hostile.
Though a few years back it would be a few seconds of warning followed by a knife, but she learned to keep her cool since leaving the raiders. Normal people (normal being not a raider or a hostage) don't react the same to sudden hostilities. Though hostages could react however they wanted, just not do anything about it.