Anyone who's ever received a late night "I want my dick all over your stuff" text knows that sexting is truly an art.
Most guys can't just put any dirty words together and actually turn a woman on.
Lets your conversation be centered on appreciating all of her, tell her how sexy, perfect, succulent her breast is. Most girls would readily send you a picture of how it fits on her if you indulge more on it.
Get into her mind and make her see the perfect sexy side of her.
that in anyway reduces her self esteem or shame her body. By talking about what turns her on and you engaging her in discussing it, her feelings are aroused and it makes her receptive to further questions or moves from you.