My question involves a marriage in the state of: California
My wife and I want to get divorced. I have evidence that my wife assaulted me. She has said she will try to get as much alimony from me as possible.

If I use the threat of turning in the evidence of assault to the police as an incentive to get my wife to waive spousal support, and she signed such a contract, would it be deemed valid if the judge knew why she signed it?

Or would it be better to turn in the evidence now - which means she may get arrested and I lose it as a bargaining chip - with the hope that the judge takes it into consideration when calculating spousal support?