Consider that Alex is the son of Bob. Alex's mother (wife of Bob) is Caren and the grandmother of Alex (mother of Bob) is Deb.
Now Alex (son of Bob) killed Deb (mother of Bob), if I want to say that Bob's son killed Bob's mother [Alex killed his own grandmother], I would probably say (suppose I am telling this to someone who knows Alex, Bob, Caren and Deb and I don't need to repeat their original names)
His (Bob's) son killed his mother
This sentence sounds very ambiguous to me. It can have two interpretations:
- His son (Bob's son) killed Caren (Bob's wife)
- His son killed Deb (Bob's mother)
Is my original sentence ambiguous? How do I remove this ambiguity from the sentence?