I have just returned form my daily walking, And during much of it I considered the hurt within my family.
The thing is, if you don't tell truths as you see them, then it's hard to resolve the issues you feel.
Will the truths hurt?
Will they challenge them?
Will they accuse you?
Of course, but first they have to read them, and the likelihood of that happening, unless they know you write here, is very, very low.
Leave things for a while.
Go for a walk.
Consider whether the risk is worth it.
All of this is why any people write under a pseudonym.