This model consists of a pred (male or female) humping a full belly

Prompts I used are:

• Male: score_9, score_8, score_7, [character], vore_humping_belly, anthro, furry, [place], solo, male, penis, balls, detailed background, cum

• Female: score_9, score_8, score_7, [character], vore_humping_belly, anthro, furry, [place], solo, female, vaginal, pussy, detailed background

You shouldn't need much more description than that, though you can play around with tags and LoRAs to reach a result of your liking.