I'd prefer to bind her in a way that pull her wrists up higher into the small of her back. That way, there is open access for whipping her arse and it might also make her thrust her tits out more, again making it easier to.tadgrt thmg
I love this! There is only one thing I would do differently: I'd rig up with a rope or strap a way to lift her wrists up higher behind her back so her arse is fully vulnerable;)