Hi, everyone. Longtime lurker, finally made an account.

Kinda searched around for more information about my question, but haven't found anyone in my situation.

So I'm a SM and BM. My oldest is 11, his dad is my XH. After we divorced, we both moved on. He got remarried. Anyway, a few weeks ago DS comes home from XH's and says that SM is having another baby. This will be XH and SM's fourth child together.