This LoRA adds NSFW 1.4 to Wan.
If there isn't a lora to do the position you want, give this LoRA a try. It gets penises further into vaginas, and makes boobs flop better, on just about any photo you give it.
It's a crying shame that we can't layer LoRA on here, this one works amazingly well on top of any of the sex lora.
But if I was on a three hour tour headed for the rocks near a desert island, this is what I would download first.