There seems to be download issues because Civitai.red is a buggy mess. will upload it here: https://huggingface.co/quadratrund

Okay so this concept is kinda complex. You wanna stick to my prompts first and then change stuff from there.
Use landscape format for the final image.

Honestly generate batches of 4. only every third image is decent. when you guys find better prompts, please tell me.

Strength: sweetspot seems to be 0.9

Prompts that worked for me:

the image shows one girl and two men. the girl is shown in a side - backview sitting on the lap of one man. this man is lying under her and is penetrating her vagina with his penis. the second man is standing next to the girl penetrating her anus with his penis. the lying man penetrates her vagina with his penis and the standing man is penetrating her anus with his penis. the upper body of the man lying under the girl is just barely visible his face not shown in the image. the standing mans upper body is out of frame and is face is not visible.  the face of the girl is slightly turned to the side, looking back into the camera. the image mainly focusses on the doublepenetration of the threesome. 

 this is a high-resolution photograph depicting an explicit sexual scene involving three individuals. the central focus is on the woman. she is positioned on all fours on a white leather couch, with her back arched and buttocks raised.   behind her, a muscular man is penetrating her anus from behind. his large, erect penis is visibly entering her anus from behind.  lying under her, another man is also nude, with his erect penis penetrating her vagina.