I suggest using this LoRA at 0.9-1.0 weight for best results.

Always add this prompt to activate it: lora:PSCowgirl:0.9, 1boy, penis, squatting cowgirl position, vaginal, pov

After that you can add other descriptive tags - If you remove penis from the prompt - It will give the effect of deeper penetration.

If you remove penis and vaginal - It will give the effect of her just sitting on you. If she is wearing a skirt or something similar - It will feel like it's implied sex - especially if you add cum.

If you add squatting to the prompt - It will show more of the position and it's a wider shot.

This was trained on NAI model - I have no idea if it works on realistic models. Images were generated on Corneo's 7th Heaven Mix using the Orange Mix VAE.