I think Law got the idea that Jesse was teasing him (giving Law false hopes by kissing him or trusting him then abandoning him later) because that scratching action was similar to how the memory is erased..
Uwah! So conflicting! This is like the longest chapter about some fight/misunderstanding ever..hopefully the drama won't be as long as 'holiday love' (づ ̄ ³ ̄)づ
Ahhhh..but i have soft spot for edward ┗( T﹏T )┛