Advice on parents behavior?

My mother has been caught cheating and she's been living on her phone ever since and we brought up the fact that she's been switching her phone off and still hiding things after she said she'd stop and she threatened to take everyone off the road and she's been getting violent she hit my dad and made it a joke and because we didn't laugh she made it about her and said we are making her feel bad and plays the victim but she says we need to try with her or she stays on the phone, swears and screams for everything these days like she hates us, so any advice?
Advice on parents behavior?
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