The grandmother decided to check the relationship with her 18-year-old grandson, whom, as it turned out, she had doubted all her life. That's just the woman's failed daughter-in-law is sure that the grandmother needed a DNA test to deprive her grandson of an apartment. The woman's daughter also thinks so, because her mother also left her and her children without a roof over her head. So what prompted the grandmother to undergo a genetic examination with her grandson — doubt of kinship or greed?