Hello and thanks for writing to us. My name is***** that would be a big surprise, especially if it came out of nowhere. There will probably be a whole range of feelings that you have in reaction to this and they would all be normal. Mostly, you will probably feel concern or worry for your sister. Then you might start to think about how the change will affect you and of course this depends on the type of relationship you have with your sister and her partner. Surprise, worry, sadness, and curiosity would all be normal, but again, if you thought this was a bad partnership, then perhaps you are feeling relieved and happy. In reality, this is a loss for your family and you will likely go through a "grief" period where there is a lot of emotions and it is on your mind a lot. And the intensity of feelings will begin to subside with time.
I am here if you to want to chat more!
Ahhh, I see. So you are really feeling blindsided. This may lead to some shock where you struggle to process what is happening but I can imagine there is a range of emotions going crazy. re you feeling angry that this is the first you have known about this? And very worried about your sister? I can't really tell you what is "normal" beyond the shock element but I am here to talk it through with you if you want. :)
So it kind of shook your faith in relationships. I can see why. It seems like a big risk. But most marriages succeed, So try not to worry too much about your own future and chances for happiness. Or your sister's. Divorce can actually be freeing and offer new and better opportunities when things weren't so great.
That is very sad. Especially that children are involved. Do they live close to you?
She is lucky to have you. The best way for you to heal is to continue to be a good support for her. You will get through this as a family.