https://civitai.com/models/200565/reverse-cowgirl-on-chair-creampie-lora
General trigger is 'reverse cowgirl'.
If she's sitting the wrong way from time to time, add 'from front' to your prompt
Use 'anal' or 'vaginal' in your prompt to get the desired result. Put the opposite one in your negatives. Increased tag strength might be necessary, e.g. (anal:1.3).
'Creampie' feature is enabled in this LoRA. I recommend using a cum enhancing TI such as realcumAI along with it.
Recommended LoRA strength is around 0.7-0.8.