If we're speaking about the loopholes of Fate
...technically Arthuria, in her Saber class, is 14
Or at least, her body stopped aging at that year onward.
"I can see in your eyes that you feel lonely, with your status.
It is something that I felt in a similar way, during my lifetime and my quest.
I wish to ease your burden."
"...I think I'll try to steal you the lead. It's funnier this way, no?"
And, as he'd reply that way, he'd lean in closer to kiss her deeply, letting his tongue run rampant between her lips, while a hand fondled one of her asscheeks and the other kept a firm hold on her side.
"Such straightforwardness, and boldness.
I gotta say, I appreciate it, in a woman.
But....."
He began speaking, advancing towards her. Instead of kneeling like she requested, he'd grab her by the waist, pulling her closer, feeling her ample chest pressed against his.