My question involves paternity law for the State of: Washington

My mother MAY HAVE BEEN legally married at the time of my birth. She listed her ex(?) husband as my father. Legal father and bio dad (not established by DNA) have signed denial/acknowledgment of paternity. Mother will not sign denial/acknowledgment of paternity nor will she submit DNA.

Is there any legal action I can take against her to force her to document either her denial/acknowledgment of paternity?