Clarifying the meaning of the father's mother inheriting through the mother in inheritance

The questioner:
He says: Honorable Shaykh, may Allah grant you success, does the father's mother inherit with her grandson because she is connected through the mother?

The Shaykh:
What is the father's mother? What?

The questioner:
The mother's mother, the father's mother inherits with her grandson.

The Shaykh:
She inherits from her grandson, yes.

The questioner:
He says: The father's mother inherits from her grandson because she is connected through the mother. Who is the mother through whom she is connected?

The Shaykh:
Do you not know the mother?

The questioner:
Even though she is the father's mother directly, and the deceased is her son's son.

The Shaykh:
Yes.

The questioner:
He says: The father's mother inherits from her grandson because she is connected through the mother.

The Shaykh:
Because she is connected through the mother who is the mother of the deceased, yes. The intended meaning of "the mother" is the mother of the deceased, yes. May Allah reward you for this question.