DEAR ANNIE: How do I deal with passive-aggressive siblings? When we are together, it can be all laughter and giggles, and the next minute all I hear are snarky comments. It took months to find out one sibling had purchased a new and expensive car. Then the talk was how to sell the old reliable model without asking my opinion. We all have social media accounts, though I have yet to see any of them post on my page. I have hobbies, and they do not; we all do volunteer work, yet there is seldom a conversation about it. I am reluctant to reach out fearing I might catch one of them on an “aggressive…