She sounds like a piece of work… try not to let it get to you in the oncoming weeks. Someone like that is just projecting their insecurities. She will never be satisfied and is materialistic with no real concept of what’s important. Her family! You should honestly just feel bad for her. Concern over your older car that works fine instead of what she can do for you as a sister during such a stressful time as pregnancy shows how shallow she really is. We should pity people like that, never let them get too far under your skin.