This is from "Not Without Loss", the only fic I've written with Cassandra in it, and this is an excerpt from a flashback in the story. It always makes me laugh -- I can actually hear Methos' voice in my head when he says 'yes, I would':
Wearily, he closed his eyes, scrubbing at his hair in agitation. When he looked at her again, he held out his hand to her. “We’re going home now. Come on.”
Still she hesitated. “Methos…”
“Triona,” he warned, his voice once again becoming stern, “don’t push your luck.”
“Or what? You’ll shoot me?” Once the words were out, she regretted them. At the look in his eyes, she wanted nothing more than to take her ill considered taunt back.
“Do you really want to find out?” he replied coolly.
She didn’t answer immediately, carrying on an internal debate as to whether he really would shoot her if she didn’t cooperate.
The debate was interrupted by an exasperated, “Yes, I would.”
Glaring, Triona ignored the still extended hand, and pushed past the ancient Immortal in offended silence, his soft laughter behind her only making her feel more persecuted. He came up to walk beside her not saying a word, but she knew if she looked at him, he’d have that damn smug smirk on his face.