Sometimes they think they knew what they wanted but didn't. Likely she has been confronted with reality and you are giving her another dose by not being on string for her. She doesn't like the loss of control, that is what the passive-aggressive accusation is all about, trying to control you further.

I wouldn't change a thing, other than just ignore her accusations. Only address logistics. "I mailed your requested doc on x/x/xx."

All business all the time.

M(53), W(54),D(19)
M-23, T-25 Bomb Drop - Dec.23, 2017
Ring and Piecing since March 2018