Quick question on wording. 

I played steal enchantment to obviously steal an enchantment.  My wife revealed nullify to stop me.  Nullify says when a creature is targeted. I said steal enchantment is targeting the enchantment not the creature therefore nullify did not affect steal enchantment. My wife says steal enchantment is targeting the creature because the enchantment I am stealing is on the creature. 

Any clarification on this?