Maybe not at first but some day you could try pushing her gently by "threatening" (sorry, the word may sound harsh but my vocabulary is limited).

You can for example ask her to keep hands behind her back, fingers crossed and tell her that breaking this position will lead to using rope or scarf. If she feels ready to try some light bondage she'll have a way to "control" the situation.

Please talk about this first, it can be even more scary for her to be pushed this way. Also be sure she won't do it just to please you (at this phase anyway). It just might help her find something even more than bondage (D/s?).

You can also keep some bondage materials beside your bed so she can try them on if she wants to (believe me, sometimes having a few moments alone with some toys might do the trick) and -more important- sees you will not use them on her without permission.