You may be looking for Giorgio Forelli, a mentioned character in both Grand Theft Auto: Vice City and GTA Vice City Stories.

Giorgio is a random character in Grand Theft Auto: Chinatown Wars.

First Encounter

Giorgio can be found on a street corner in East Island City, Dukes. Giorgio suspects his wife Phyllis is cheating on him with another man. He wants Huang to bug his wife's car in Hove Beach so that he can track where she goes. Huang heads to Hove Beach and plants the bug under the car. Huang walks away to see the wife enter her car and drive away. The reward for completing this mission is $20.

Second Encounter

Giorgio can found at a hotdog stand in Steinway, Dukes. Giorgio wants Huang to drive him over to where his wife is, Huang does so and Giorgio finds out that his wife has become a prostitute. Fed up with everything, Giorgio pays her $20 for sex. The reward for completing this mission is $20.