Originally Posted by IAmFCA
If it isn't yours alone, then it isn't yours. And certainly isn't hers.
If you intend or are required to control this wealth individually and/or for the benefit of your birth family/siblings/parents, then you need to be clear about your role, and the fact that the money isn't as available to you as it might seem.
If the money is available to you, and was when you needed it but you chose to hide the money instead, then you need to be clear about why you made that choice, take responsibility for letting the family struggle, and point out the benefits of that. You also need to be clear about how you will behave going forward. Take responsibility for damaging your relationship by hiding something from her, and assure her that now you want to make decisions as a team, even difficult decisions. Especially the difficult ones.
In return you will need her understanding. Earn that by offering her your own.