Pointing at a woman, Ram said, “She is the only maternal aunt of my maternal aunt’s daughters, and I don’t have any maternal uncle.” What is the relation of the woman to Ram?

Let's break down the statement made by Ram step-by-step:
"My maternal aunt's daughters" → These are Ram's maternal cousins.

The mother of these cousins is Ram's maternal aunt.

Ram mentions "She is the only maternal aunt of my maternal aunt's daughters".

For Ram's maternal cousins, their maternal aunts would be the sisters of their mother (i.e., Ram's mother or other maternal aunts).

Since Ram mentions he has no maternal uncles, his mother's family only consists of sisters.

The only maternal aunt of his cousins must be Ram's own mother (since any other sister would mean there are multiple maternal aunts for those daughters, but it says "the only maternal aunt").

Therefore, the woman is Ram's mother.