Step 1: Analyze "only son of my father"
The phrase "only son of my father" identifies Ravi, assuming he is the sole male offspring.
Step 2: Woman is Ravi's daughter
Consequently, the woman is Ravi's daughter.
Step 3: Clarification of relation
The query seeks the relationship of the woman *to* Ravi.
Step 4: Verification
If "only son of my father" is Ravi, then the woman is indeed his daughter.
Step 5: Final Answer
Therefore, the woman is Ravi's daughter.