Adding a hand shower to a Roman tub faucet is possible, but it may not be as easy as you think. First, you need to identify the right model of hand shower that will fit your faucet. Second, you need to determine if your water pressure is strong enough to support the added weight of the hand shower. Third, you need to make sure that the diverter on your faucet is compatible with the hand shower. Lastly, you'll need to install the hand shower according to the manufacturer's instructions.