Does burying a newborn child with a deceased friend in the same grave by coincidence affect a man's righteousness and his questioning in the grave?

It is not permissible to bury two or more persons in one grave unless there is a necessity, such as a high number of deaths due to an epidemic or war. If two persons are buried in one grave, it is not permissible to exhume the grave to remove one of them, because the harm of exhumation is greater. There is no relationship between those buried in the same grave in terms of the questioning in the grave and its torment, for each will be recompensed according to his deeds.