No. It's not yours.

HOWEVER, generally, if your ex decided to quit work because he's rich over the inheritance and insurance from his father's death, then the court would count up your entitlement to alimony or child support based upon him NOT quitting work. And if you were married to... oh, let's say Paul McCartney just for the fun of it... and he was able to sit back and do nothign for the rest of his life because of everything he already did and owned before he married you and so it's all separate property... (like the inheritance)... and while you were married the two of you lived off his separate property and that made it so that you got this expectation of never having to work again so you never ... I dont' know, renewed your license to be a nurse (what happened to a friend of mine)... or... let's say you were a high fashion model when you married him and your work slowed down because you had his baby... and then by the time of the divorce you were no longer marketable as a high fashion model because of age, time spent out of the limelight, and having his baby... well, it's likely that you'll end up with some of his separate property.

But that's a case where he's SOOOO rich that he really won't miss the fact that one of his bazillion dollars worth of houses is no longer in his estate and is being lived in by his child, whose mother is also there and is your ex.

There are circumstances, REALLY RARE circumstances, where you can find a way to convince the judge to give you a piece of his inheritance. But you have to have a REALLY GOOD reason. Not just that you wnat it and he's a jerk and is dad loved you or whatever. If his dad wanted you to have it, he'd have written a will for you to get it instead of his son.

If yours is the ordinary situation, the time you spend trying to get part of his inheritance will be a waste of lawyer's fees and a huge disappointment to you in the end.