You can generally con women by acting as if what you want them to believe were true, while saying something completely different. The only question is exactly what actions send the right message, and how to make them convincing.
Women always assume that what people say has an arbitrary relationship to the truth. They learn that by looking in the mirror.
This is why you never, ever give a woman an ultimatum. They’ll assume it’s a bluff every time. You’ll get a lot farther by telling her everything is fine, while smirking like an asshole, and then changing the subject to the weather.