Hi Rainyday and welcome. I am so sorry to hear of the difficulties you and your wife have been through with her mom and sister.
You are not alone. I know that is not much comfort though. We do understand a lot of what you are going through though and you have landed in a great spot to get support and some feedback on what has and has not worked for others who have been through this before or are going through it now.
You asked:
Can we actually stop walking on eggshells now?
Yes, you can. We have tools and strategies that can help you both cope better regardless of whether you continue a relationship with your MIL or SIL.
Have you had a change to read some of the articles we have here? The articles that people find most immediately helpful are listed here:
How to Get the Most Out of This BoardPull up a chair and read and please feel free to jump into other threads and interact. We all work together to support each other and give feedback. Most of the learning I have done is through interacting with others here.
Hope to see you more often on the board
Again,