Legal Question in Real Estate Law in Florida

It depends on how it was left to your cousin.

It also depends on how the property is deeded If your mom has an interest that survives her death and dies without a will then you may have a claim. However, if your mom's will devises the property to your cousin, then you may have a difficult time. You should talk to your mom and ask her if she has any intention of leaving you her part of the property. It's a hard discussion, but you should probably have it with her.

You need to know how Mom and your aunt had the house titled. As tenants by survivorship or tenants in common. If tenants in common on the death of the first the property owned by the decedent transfer to their Estate and passes by their will. If tenants by survivorship than it passes to the survivor and then to the survivor's Estate upon death. Transfer than would be by will. In order to have an interest in the property you would need to be in both Wills or you could be left out without any recourse.