Florida - A daughter-in-law bit their mother-in-law last year. Police were called and the MIL said she would not press charges if the DIL went to counseling. No arrest or citation was made at the time. Spats without physical violence have gone on for a year and MIL wants to file charges now. The DIL was already going to counseling for something else.
Can the MIL place conditions on the DIL like that?
What are the chances the DIL would be charged?
Would the DA see this as a power trip by the MIL (to make DIL prove she talked about it in therapy as a guise to get to see the DIL's therapy records and most likely to use against her in another matter)?

