What you are claiming actually is that she is invading your privacy and the documents she seek are irrelevant. Here is a form I've made for you:
Notice of Motion to Quash Subpoena
SUPERIOR COURT OF CALIFORNIA,
COUNTY OF ___________________
Case No. ___________________
NOTICE OF MOTION AND MOTION TO QUASH SUBPOENA
Date Action Filed: ___________________
[Trial Date: ___________________]
To ___________________[name], plaintiff, and to ___________________[name], his/her attorney of record
NOTICE IS GIVEN that defendant ___________________[name] appears specially to make this motion only and, so specially appearing, does and will, on ___________________[date], at ___________________[time], or as soon thereafter as the matter may be heard, in [___________________ (Department or Division) ___________________ of] this court, located at ___________________[street address], ___________________[city], move for an order quashing the subpoena on ________________ [employer's name]. The motion will be made on the ground(s) that the requested discovery seeks irrelevant material outside the scope of discovery in this litigation
, and seeks documents which if produced would violate the constitutional right to privacy of defendant.
Plaintiff seeks information and documentation from Defendant's employer regarding Defendant's income levels after a divorce in which spousal support has been awarded. Defendant's post divorce income levels are irrelevant to Plaintiff's burden for seeking a modification of spousal support. Accordingly, Defendant requests that Plaintiff's subpoena be quashed.
______________________ [firm name]
______________________ [typed name]
Attorney for Defendant ______________________ [name]