He keeps her guessing.

He grinned cheekily as he worked his tip, sticking his tongue out. "It's my question."

She finally stuck a finger into herself, letting out the tiniest of whimpers as he saw her finger get immediately coated in her wetness. One finger quickly turned to two and he was mesmerized as he saw his potential sister-in-law hungrily fuck herself.

He snapped out of it as she took a moment to look at him. "W-well? Are you going to ask anything?"

"What other fetishes do you have?" He asked.

"Um...I guess...d-don't tell, but I like being submissive. I like it when a man tells me what to do or makes me do something."

"So if I told you to turn around and finger yourself from behind, you'd do it?"

"Much more so if y-you were...you know." She bit her lip as she worked on her clit. "My dom."

"You've wanted to do something like this for so long, haven't you?"

She nodded. "Mhm."

"Your sister's boyfriend...your dom?"

Another nod.

"So you'd be completely mine, no questions asked?"

"Total submission--ahn!" She crooked her neck as she began to finger herself with her middle and ring finger and work her clit with the other hand.

"And what about Kaitlyn?"

"I-I promise I won't tell. It'll be our secret."

On one hand -- he was very much so enticed by the idea. So much in fact that every fiber of his being wanted it.

But on the other... somehow, in some way, his conscience pulled him away. He still loved Kaitlyn, he loved her so, so much. Why was he so addicted to the thought of her little sister?

He had a choice to make once again. Was he going to do this? Was he really going to warp his relationship with Kaitlyn?