I noticed upon signing up that it said for beginners in bondage to use a silk scarf when she is highly aroused and entice her.
This is a NO NO!
Contrary to common belief, those who practice BDSM or just bondage put SAFETY right up there along with PLEASURE and CONSENT. BDSM=Safe, Sane, Consensual.
Not practicing safety is not very sane.
If you use a silk wrap of some sort, or anything too thin, it can knot or tighten way too easily. If she is given a 'safe word' (as she should be) you MUST, as a good Domme, untie her immediately. If you need to struggle to get the rope or silk undone, this is no longer fun and will most likely alarm her. Not cool. Even if you have scissors available for this type of emergency and even if they are within arms reach, they need to be safety scissors. Not thin like regular scissors. First Aid scissors are best. Those are thicker and may not fit comfortably between her skin and the rope/silk.
Also, the tighter it goes, the more you risk leaving a mark, and even though for some this is not a problem, keep in mind many cannot have marks for work, and many are also closet BDSM participants for any one or number of reasons.
On top of that, the tighter it goes you also risk cutting off circulation. If she enjoys being tied up as one of her sexual practices, no matter how often, she may not realize that her circulation may be or already is being cut off. That is why the Dominant partner, or partner not tied up, has the job to keep her safety as the biggest priority. Especially if she is in 'sub space' and may even like it.
**A good Domme is aware of not only the fun parts of BDSM, but also of the safety that is necessary to thoroughly enjoy your interaction together, regardless of how many people participate. Also, it is crucial for the Dominant partner to KNOW WHAT SHE IS DOING and even practice on HERSELF or another Domme if she is engaging in a new activity. Remember that your sub partners/lovers trust you and you must do everything you can NOT to ruin that trust!**