How should I handle problems with siblings?

No email. Call each other when she says something bizarre and verify the information. Unfortunately email is often read in the wrong tone of voice. Once you are all on the same page, she can no longer divide and conquer. Old parents often use "divide and conquer" statements to deliberately cause the children to argue among themselves. This gives the parent a sense of control over all of you. I bet she has been doing that for years. Beat her to the punch, talk to each other weekly.

Thanks pamstegma! That is disturbing, but rings very true. One of the many aspects of this...situation, is the question of how long this really has been going on. It's caused me to reframe my entire life.

OMG - I actually had to look twice at the posters name!!! I have written this exact post in my head a couple of time!!! I will also hope to find help within the comments! Starting to wonder if I've finally lost my mind and Ribbman is an alter.

It's been going on since you were a kid. Now you know enough to beat the game. How did I learn this? The hard way. LOL

Sometimes it seems like the hard way is the only way...