Omg I'm so sorry for not seeing this earlier anon. I think - and hear me out - missionary. I don't care if it's basic, it fits these two so well. I hc that at the start, when they might have only been a loose acquaintances/friends/allies with benefits situation, they would have done a lot of positions where they couldn't directly look at each other. Anything to hide just how much they were enjoying the sex and each other. Lyney especially would be like that lol insisting on Wriothesley fucking him from behind or doing reverse cowgirl, if only so Wriothesley can't see how he's forming his name with his lips between moans

And then they'd fall in love with missionary when they finally get closer, and how they're able to watch each other from up close thanks to the position 😩 seeing the pleasure on the other's face, the love and adoration in his eyes. Lyney's able to wrap his arms and legs around Wriothesley like this and pull him even closer, and they CAN KISS IN THIS POSITION!!! They can let go and there's no space left to hide their feelings when they're close like this and I love that for them 🥰