It's essential to consult with a legal professional for accurate advice specific to your friend's situation. However, I can provide some general information on the matter.
In cases of inheritance and distribution of assets, it typically depends on the laws of intestacy or the terms outlined in the deceased's will. Intestacy laws vary from one place to another, but generally, if someone passes away without a will (or if the will is deemed invalid), their estate is distributed according to the laws of intestacy. In such cases, the surviving spouse and biological children usually have priority in receiving the assets.
The adopted daughter's legal rights to inheritance may depend on whether she was legally adopted and recognized as an heir under the laws of the relevant jurisdiction. In some cases, legally adopted children may be treated the same as biological children when it comes to inheritance.
If there is a dispute over the distribution of assets, it may be resolved through legal proceedings, such as probate court. It's crucial for your friend and any involved parties to seek advice from an experienced attorney who can review the specifics of the situation and guide them through the legal process.
Again, I must stress that this information is general in nature and not legal advice. For accurate advice and assistance, consult with a qualified attorney who is familiar with the laws and regulations in the relevant jurisdiction.