Any advice would be appreciated

[Wiscoman]

It may be worth looking into emergency release systems to put her at her ease. It may not feel 'like bondage' to you if she can escape at any time but you can see it as a physical equivilent to a safeword - she can only use it when it is an emergency.

Good thinking. You might consider rope bondage using a half-bow knot. It's pretty easy to tie. Basically, you start it in a halfknot, over and under like you start a square, the loop one of the ends over and finish it like a square -- under, then over. This leaves a loop one one side. If you pull the rope leading to the loop, the whole knot collapses. So you can untie it with only one hand. Otherwise, it's as solid and fast as a square knot. I found a diagram here. The only thing I'd add to this would be tying a knot in the running end or "ripcord" so she can't accidentally pull out the loop the wrong way -- then you'd have an actual square knot.

Just make sure she can reach her "ripcord" and she'll be able to get out of pretty much anything, assuming it's not extremely elaborate.

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ETA: I took a closer look at the army halfbow and see it's not the knot I'd remembered. Still, the one in the diagram looks easy to tie and should work just as well.In