My honest suggestion is do not, people critic photorealism images harshly. When quite honestly to produce an acceptable image to a say playboy quality takes untold hours of manual editing.
That being said the simplest method would be to install Stability Matrix and use the Juggernaut XL model with a tone of VAE, Configs, HiRes and Face Detailers to get the desired affect. Then be prepared to spend hours in Photoshop to get the expressions. lighting, colors, fading and dimensions correct...
Here is is a sample which took me 2 hours (I will not be doing this again) and it not even close to a throwaway image you would get in a bonus folder in a NSFW game
Maybe someone else can point you in the direction of some models and LoRas that would speed up the workflow... (I am very AI assist, not full Gen)