i don't know if you can nudge unless your DD is receptive to it
how much does she understand? Will she wait for a feed if you tell her to?
my DD was a hardcore feeder and i went cold turkey with her when she was three which honestly was a breeze - however, I had built it up for about 6 months and i did have an older, rather than a younger sibling who wasn;t being nursed
can you try rewards? reducing the time of the feed?