I don't dry brush. I have a pic in my album of why I don't. If I go by the curly consensus over at nc.com, lots of curlies don't dry brush, but a good sized minority do.
But, one has to detangle somehow. I detangle in the shower using a combination of finger combing and a wide tooth comb with a detangling conditioner.
Maybe she'd be willing to come here and join the curly group or else over to nc.com?