Lora trained on under the table fellatio / paizuri.

It's more of a desk than a table lol.

Works with some character loras.

Trained on NAI, gen'd on AOM2 nsfw.

Paizuri is kinda iffy but will occasionally work.

These prompts "desk, spread legs, pants, between legs, uncensored," can help with generation but there could be more.

You may be able to prompt this manually without the lora but I honestly can't since I don't prompt that much.