"Last I checked, I am in fact real," Steve tells her, seeming to touch his arm 'just to make sure'. He couldn't be too sure these days if he was real. After being transplanted in a strange, unknown town and learning people who were known as only comics were living, breathing entities here, you could never be too sure of what was and wasn't real. If only he had understood the slang of the 90's, he would realize what she said and what she meant were two different things.
Standing his ground, even when she waved the 'evidence' of his kindness in his face, he only seemed to grow uncomfortable when the prospect of his wanting sexual favors came up, "I didn't take you for that sort of dame and I'm the sort of man who would rather get his dates the proper way. Offering a woman a twenty in hopes of a date doesn't seem very proper to me." He was shocked in a way, hearing a woman talk so freely about sexual intercourse like it was a commodity. Such a thing was considered bad business in his day and you definitely wouldn't come looking for it in the light of day like this.
"I know it must be hard to believe, but I don't want anything from you. The money is just to help you get by. If it makes it easier to accept, we can consider it a loan, but I'd rather you just take it, honestly."