an IM exchange, thoughts please

This on a mobile dating/chat app:

Girl is a 7.5 in pics

(around noon)
Me: (my opener)
(early evening)
Her: The work kind. But now I'm home, so I'll have to figure out something to do
Me: I can think of a few things for you to do
Her: Like?
Me: you can make me a sandwich. I'm hungry.
Her: I could, but if I make you one, would you make me one? Like a cook-off?
Me: No but if you make a really good sandwich I'll give you a really good back rub
Her: Hmm, negotiations, I could work with that.
Me: The massage will feel amazing, my hands are magical, we may need to renegotiate our terms
(a couple hours, no response) and she appears to be still online.

I think I just need some persistence here but for some reason I'm not sure what to plow through with.

Update she replied with "Why?"

I'm going to wait and see if she follows up on her own or maybe I'll reply tomorrow. Still interested in any ideas anyone may have.