He sets about removing the rest of her clothing. 

He is just full of excellent plans, isn't he!

Out here on the floor is maybe not the most comfortable place to be doing this, but she doesn't actually mind.

It turns out being charming isn't the only thing he knows how to do with his tongue. 

Ooh.

Excellent. 

Why yes, he is.

Oh good. 

Once that's reached a satisfactory point, he sets about removing his own clothes. 

Naina can help! She's very helpful.

"If we do this the conventional way, is there any risk of you getting pregnant?" 

"Nope! Winged people don't do that."

"Excellent." 

Then things can proceed in a normal, if perhaps higher-quality than "normal" would strictly imply, fashion. 

Things are going to be very, very high-quality.

Oh good. 

He purrs into her neck.

Mmmmmmm.

Yes. Very high-quality indeed.

Afterward, she snuggles him a little, even though this floor is still kind of uncomfortable to lie on. He's worth snuggling.

And then—she pauses, mid-snuggle, and smiles, and sits up, and a pair of enormous raven wings sprout from her back.

"There they are!" she says, stretching them out to their full span and then folding them up again. "Oh, I missed these."

"Was that a coincidence, or?"

"Oh, they would've come in anyway, but it would've taken a little longer."

"Your magic runs on sex?"

"I suppose you could say that."

"Fun."

"It has its ups and downs. Pretty happy about it at the moment, though." She kisses him on the cheek.

Aww. He kisses her on the cheek back. "Mine uses bells."

"I was wondering about those!"

"Do be careful with them; they're dangerous in unskilled hands. Or skilled ones, but less so." 

"Thanks, I'll remember that. Not that I was particularly planning to mess with your things, but it's still good to know."

"I don't especially want to find out how Astarael interacts with the death ward."