Can Military Stress on a military member cause injury illness to their family members?

My example, First, I review how my mom loving mom passed away at an early age and how stress would of caused her heart conditions, and how my medical conditions diagnosed caused in service stressed her out. Second, myself and my mom were unknowingly dependents of my father(deceased) discovered, after I finished Navy, an Army Soldier 66-68 11th LIB Jungle Warrior. I did not recieve VA support for nearly a decade after service, and my dad and us his family did not ever receive VA Support when he became ill unable to care take any longer, leaving a very young mom with very little education.

I want to know from others how military stress on the member in service and veteran can cause illness in other family members dependents, and what can be done to solve it.