Andreev went to work in the North

Andreev went to work in the North. His wife Lily died of a heart attack a few days later. Arriving to the North, Andreev could not find a job and lost his passport. Andreev began to bomb. Having made it like this for 6 months, Andreev met his longtime acquaintance, who took Andreev to work as a watchman. Andreev worked for 2 months, earned some money and decided to return home. When I arrived, I found out that my wife died 8 months ago. Andreev turned to a notary public to obtain a certificate on the allocation of a share in the common property as a surviving spouse and a certificate of inheritance. By this time, Lilia’s mother had already received a certificate of inheritance for all property left after her daughter, including an apartment purchased by Andreev and Lilia during the marriage, but issued in the name of Lilia. Lilia’s mother didn’t mind that Andreev got his share in the inheritance, and believed that the apartment as an inheritance after Lilia should belong to them in equal shares. Question: what should a notary do in this situation, in what shares should the apartment be distributed?