I would say that is a realistic fear kells, because lets face it, it is already researched and results obtained that children who grow up within disruptive households and households with parents having mental illness, the children themselves often become more susceptable to depression and other illnesses themselves. However... from bits and pieces I have also read, it is not always the case, because it depends on each families approach to the circumstances. Whilst some childrens scores where higher for disruption, others where not. This means that you as parents and the sufferers of the illness control the path your children grow within, and the influences that could directly impact them in adulthood. If you have uncontrolled PTSD, anger and sentment constantly displayed to the children, offcourse they are going to grow up thinking that is normal. If you have controlled PTSD, emotional discussions, talk, family time together and arguements and household disruptions are minimal (no different from any household), then the children should be just fine, if not less susceptable because they are capable to deal with their emotions at an emotional level, and not display what mum and dad did, fear, anger and rage, no communication, etc etc...

We choose our emotional paths for our children... sometimes that is enough to ensure adults get themselves constant help and therapy, ensuring their children do not become part of the current cycle.