The analyses of a text #5

The narrator recalls his adolescence.
He and his friend Steerforth stay at his old nurse's Peggotty's hometown for fortnight.
Tonight, He visited at Steerforth's lodging, and then the female dwarf, Steerforth's acquaintance Miss Mowcher visited here.

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This lady, dressed in an off-hand, easy style, bringing her nose and her forefinger together, with the difficulty I have described, standing with her head necessarily on one side, and, with one of her sharp eyes shut up, making an uncommonly knowing face, after ogling Steerforth for a few moments, broke into a torrent of words.
"What! My flower!" she pleasantly began, shaking her large head at him. "You're there, are you! Oh, you naughty boy, fie for shame, what do you do so far away from home? Up to mischief, I'll be bound. Oh, you're a downy fellow, Steerforth, so you are, and I'm another, ain't I? Ha, ha, ha! You'd have betted a hundred pound to five, now, that you wouldn't have seen me here, wouldn't you? Bless you, man alive, I'm everywhere, I'm here, and there, and where not, like the conjure's half-crown in the lady's hankercher. Talking of hankerchers?and talking of ladies?what a comfort you are to your blessed mother, ain't you, my dear boy, over one of my shoulders, and I don't say which!"
[David Copperfield by Charles Dickens]
1. I'd like to know if "together" is an objective complement of "bring."
2. I'd like to know if "you're there" means "there you are."
3. I think she mentions the reverse of the present fact according to the adverb "now."
So I was wondering why it is "wouldn't have seen," not "wouldn't see."
4. I'd like to know "over one of my shoulders" modifies "boy."
5. And I'd like to know what "I don't say which" means
Thank you in advance for your help.