Gotta do get better at whatever is "forced of you". You've gotta be strong to resist all onslaughts of PD, and you've gotta be ready to accept change' So you're flying through the middle age of life , when a PD bomb hits your home. Only one member of your family will end life with the actual disease.
So "coping" with PD families is a multidimensional question. Who is forced to do what coping? It is the champion question of pretty well all that you can ask from us.
WE cope with the knowledge that there will be an always a better way to live with PD during the interim period between now and an acceptable, relatively easy and ultimately worthwhile "cure".
You fall down, you get up, you fall down , you get up, you fall down then, ---- this ----, I'm going to bed for a couple of days to heal up so I can walk