. . . since my personal portfolio is technically only mine - it's in my name, I've contributed all the money to it, I opened it after we had separated . . .
Again, best to validate that assumption with the laws of your state.
In my state, there is no such thing as
"my money" while you are married. There is only the community's money; i.e.,
"our money." When you are separated, you are still married. The wife's claim on community property doesn't end until settled by a legal divorce.
It works the other way around as well. I bought my house
years before I ever got married. The deed and mortgage were only in my name. But since I was still paying the mortgage out of my paycheck, which clearly was community property, I was co-mingling community property (my paycheck) with sole and separate property (my house), which essentially made my house part of the community's property.
Your assumption might be completely legitimate in some states, or flat out wrong in others. Logic won't serve you well in marital matters. You probably already knew that. But it's more true when ending a marriage than at any other time.
Edit to add: I realize I might have ended this post with a cliff-hanger. My wife and I had a reasonably amicable divorce. I engaged a do-it-yourself service to advise us on a marital settlement agreement (MSA), and we ended the marriage legally with a settlement that we both considered fair; i.e., I kept my house. No lawyers bickering in a courtroom were involved.