Get closer to cast the spell.
From Create Your Own Story
As you get closer your foot hits a basket of towels knocking it over. The guard hears this and looks over to you and smiles. "Oh! Here I though I was going to be alone today." He gestured to the area next to him in the pool. "Come one now. Plenty of room for the both of us. No need to be shy, we're both men and this is a bath house." You play it off like you're shy and you get close to him. You hold out your hand and cast the spell on him. Almost instantly he stops and then stands up and turns around. He bows saying. "How can I be of service my lord?"