What the hell do you mean submissive? (suggestive)

The Captain cleared his throat, his fingers still inside of Kellen, and Kellen turned his gaze towards him. 

When Kellen met his gaze, he found a gentle, golden gaze staring down at him. With such deep affection etched into the Captain's face that Kellen felt embarrassed from that, not from the situation he was in. 

"I think, my dear, we need to discuss safe words." Rhys whispered soothingly, and Kellen blinked. 

"Safe…what?" Kellen said in response, and a grin split the Captain's face. 

"Mm. Alright, let's start from what you know. Or what you think you know. I am an Esper, and you are a Guide." Kellen nodded. That was pretty hard to fuck up. "And I assume you've heard rumours about those two groups interacting?" Kellen nodded again. 

"Everyone has heard that. Um, but, could you…" Kellen trailed off, shifting slightly. Kellen flushed, looking to the side. He didn't mind having this conversation, but the Captain still had his fingers…inside of him.