An ******* nude model. Also known under the name BDSMcouplexxx.
It can be hard to get rid of her collar/necklace and navel piercing, since she has one in almost every source image. Negative prompt "necklace, collar, navel piercing" and increase the steps to 30 and hope for the best.
I also recommend adding "breasts" to the postive prompt for more accurate breast size, and sometimes also "skinny" to emphasize her body type.
Use with weight between 0.4-0.6.