As she was making a lot of noise when receiving these gentle strokes of a belt I would have fetched a cane to her beautiful bare bottom and told her that she was to receive 20 strokes ( very Hard ) and if she was to wriggle around or make a fuss then I would begin again !!!!xxxx
If dominated and spanked properly, there's no need to be tied down; the sub will do as they're told fearing the consequences if they don't. I insist they remain on their tiptoes bent at the waist over the bed.