My family never knew I was going to get a divorce until two weeks after my ex had moved out. (It was amicable, but still divorce is never fun.) I refused to vent any issues I had with them and I stand by it. Even now, when I mention my ex I never say anything negative.

Far too many people run to their families because they want an echo chamber. And they want their family to help them gang up on the other person. And it's NOT a sign of a mature person and can signal that this is not a healthy relationship.