Really good question, LDJ! I worried over this one so much I went to see a child psychologist. She basically said, "Your son knows. He probably doesn't have a word for it, but he knows something is wrong."
I think you can accomplish the goal of raising a resilient child whether you tell them or not -- a lot depends on your situation. My son was 8 when I told him his dad was an alcoholic, and it did escalate the danger factor by a multiple of 100. For example, S8 told his teacher that his dad was an alcoholic, and she told him about AA, and then he came home and told his dad. That was quite a night.
Lesson 5 to the right in the sidebar has some resources about this that might be helpful:
https://bpdfamily.com/message_board/index.php?topic=182254.msg1331459#msg1331459Here's a few items that might really help:
What to tell kids about a high-conflict co-parentIn this article, Bill Eddy writes, "Many parents have asked us about how to raise a child or children with a co-parent (whether a spouse, former spouse or unmarried partner) who is “high-conflict.” It is very important to avoid being accused of “bad-mouthing” the other parent, by speaking negatively about him or her to the children and providing too much information about adult issues, such as a court case. On the other hand, you want to protect your children from the blaming and uncontrolled behavior of the high-conflict co-parent, and to provide the children with coping skills and help them not blame themselves. Read more.
https://bpdfamily.com/message_board/index.php?topic=203238.0TOOLS: Child development and parents with mental illness As parents, we benefit from understanding the natural developmental stages our children experiences as they grow up. It's good to know that a toddler's "no" is most natural and necessary, for instance. As parents, stepparents, grandparents, and other significant adults who may share in the care of children who have a parent with mental illness, an additional layer of understanding is also needed. How does the child's developmental needs intersect with the parent's mental illness? What are the impacts of a parent's mental illness during different developmental stages? How can we support children so they grow up as resilient as possible? Read more.
https://bpdfamily.com/message_board/index.php?topic=167128.0POLL: From Risk to Resiliency--Protective Factors for ChildrenThe effect of parental mental illness on children is varied and unpredictable. Although parental mental illness presents biological, psychosocial and environmental risks for children, not all children will be negatively affected, or in the same way. The age of onset, severity and duration of the parents' mental illness, the degree of stress in the family resulting from the parents' illness, and most importantly, the extent to which parents' symptoms interfere with positive parenting, such as their ability to show interest in their children, will determine the level of risk to a child. Read more.
https://bpdfamily.com/message_board/index.php?topic=93196.0I'm also a big fan of the lesson validating kids from the same lesson (5). Your son needs to know that how he feels is real, and that someone is listening and validating him. Even if it's hard to hear, even if you wish it weren't true, even if you want to fix it but can't. Validating him will give him something he probably desperately seeks because people with BPD tend to invalidate their kids. They don't have good boundaries and trouble with impulse control, and this makes it hard for them to act in adult ways, which can be very challenging for kids.
LnL