You had to dress up as a nun for the mission. Two soldiers even got their mondules for taking pictures of you in nun clothes. You went outside and lit a cigarette. You didn't smoke or have an addiction, you were just really nervous and trying to calm down. You didn't even want to know how they managed to convince the priest to let you work as a nun at the service today...

Gravez: "Can such a lovely girl stand and smoke? Does God allow it?"

He's clearly hitting on you, but he was also a target you needed to catch. It's strange that he even came to the church... Hmm... Maybe he has an important meeting with someone there?