"Charlie," she offered in response, almost without thinking.
She hadn't meant to offer an invitation by speaking out loud; Jack's head swiveled toward the new comer, jerking a bit at his collar to get in range for a better sniff; she wound both hands into his bright red collar, keeping a good hold on him and silently berating herself for forgetting his lead. Charlie glanced at the hand, then back up to its owner's face, her expression bordering on anger.
"And if I wanted to live in a pitch-black cave, I'm sure there's beach property that offers just that for the low, low rate of nothing, except watching out for high tide," she added, using her hold on Jack as an excuse to ignore the offered handshake.
The accent was a little intriguing, though the only part of it that Charlie could place was the English bit. Even though she had absolutely no reason to be rude to this woman, Charlie never gave up an opportunity for confrontation.