Inheritance & divorce

As the title says, I have a question about upcoming inheritance and how it relates to a pending divorce. Family member is inheriting a house from her mother's estate (still going through probate). She separated from her ex shortly after her mom's death and they're now in the process of getting a divorce. Question is, will the ex be entitled to any of her inheritance from mom? He isn't mentioned in the will or anything, just not sure if it's considered a joint asset if they separated after her mother passed but she doesn't actually have the property yet. This is in Nova Scotia if that helps. And they do have kids together but I'm not sure if that matters or not.