Ardyn grows increasingly amused with Noctis' progress during chapter 13 and sneaks into the safe room where Noctis is resting to tease/taunt him directly. Who wants to bet they're both super pent up by this point in time and the sexual tension is about to explode? Up to anon if they take it further than frottage.

Bonus points if:
+ both end up getting really into it and get off of each others' reactions
+ Ardyn initially holds Noctis down to restrain him, but once turned on enough, Noctis wants to touch back and Ardyn lets him
+ Noctis makes a complaint about Ardyn's many layers of clothing and Ardyn sasses him back for it