Who am I to Teresa?

Question:

If Teresa's daughter is my daughter's mother, what am I to Teresa?

Answer:

To Teresa, you are her daughter.

Explanation:

Teresa's daughter is your daughters mother.

When you say "Teresa's daughter," you are referring to yourself, as the person asking the question. Since Teresa's daughter is your daughter's mother, that means you are the mother of your daughter. Therefore, you are Teresa's daughter.

Conclusion:

In conclusion, based on the given information, you are Teresa's daughter.