Every time the spider

 Every time the spider
 steps
 from his web
 he must
 redefine
 his own edges.
  
 Finer than whisper
 or the ruin
 of a leaf,
  
 he moves precisely,
 quicker than silence.
  
 Step on
 Step,
 making the most
 of a grace
 which horrifies
  
 her naked leg
  
 beneath.