I've never had to attend to my mother's toilet needs so far, my biological father has never deigned it necessary to include me in his life, so I know nothing of him. My former stepfather (married to my mother from the time I was age 4 until age 14) passed away about 15 years ago, and he had not been in my life since the divorce. I never attended to any of his needs either.
I'm not sure if this qualifies as my having done or not having done my filial duties. ~