It's too bad. I feel like I'm in a rare middle ground with NTR where I'm neither particularly aroused by it nor averse to it. Take Kan, or perhaps the creepy soup bowl scientist at the party. If they could take advantage of Yuna, it would make for some excellent, REAL conflict in the game.
The Kan bedroom check is currently an annoyance at best. But if he was coming to snatch your prey right out of your hands? Your palms would start sweating as soon as you hear the footsteps coming up the stairs! Deflecting these male rivals would add some great stakes to the game, a pressure on the player that currently doesn't exist. As it stands now, there is no lose state except for Yuna waking up which is easily preventable and quickly repeatable.
I intend to use this idea in my future games. NTR not as a carrot but as a stick.