Ianto smiled politely, "Hello, I am Shawn's escourt, making sure he doesn't get lost," he took Juliet's hand and shook it his smile still in place, he heard the call for his coffee order, "I'll be right back," he turned on his heels and went to collect the coffee for himself and Shawn. At the counter he turned and looked at Juliet and Shawn, literally taking a step back to try and understand them.
After a moment he moved back over with the coffees and passed Shawn's to him, "Would you like me to give you some privacy?" he asked trying to gauge their reactions to what he said to try and figure out their relationship.