One could always tell when they were being watched. There was just that sense, that feeling that something was amiss. That someone was, actually, watching you. So Betty turned her head and offered a smile to the frowning man, not sure what he had to scowl about. Perhaps he was just having a bad day and didn't care for the snow.
Raising a gloved hand, Betty waved to him. There was no point in her being sour just because he was. Besides, sometimes, something as small as a smile could brighten someone's day.