parameters - txt2img

furry, anthro, duo, sex, foot focus, feet focus, foot job, paw pads, pink paw pads,
BREAK,
2boys, fox, male/male, canine penis, balls, knot, adult, young, excited, motion lines, age difference, size difference, father and son, large cock, amber eyes,
BREAK,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, absurdres, depth of field, newest, scenery, ultra-detailed, detailed eyes, detailed fluffy fur, dynamic lighting, 8k, HDR, ultra-HD, highly detailed, HDR, realism, realistic, photorealism, photorealistic, realistic lighting, caustic shadows,
BREAK,
son giving father a footjob,
Negative prompt: (honey), human, (worst quality, bad quality:1.2), lowres, low quality, bad male anatomy, bad female anatomy, grainy, noisy, render, filmgrain, text, deformed, disfigured, human penis, (female), (breasts), abs, extra fingers, bad anatomy, extra fingers, white background, black background, signature, patreon, web address, text, feral, blurry, faded, antique, muted colors, greyscale, boring colors, flat, bad photo, terrible 3D render, black and white, glitch, cross-eyed, lazy eye, ugly, distorted, glitched, lifeless, bad proportions, watermark, window, human penis, vagina, looking at viewer,
Steps: 40, Sampler: Euler a, Schedule type: Karras, CFG scale: 5, Seed: 3371440220, Size: 1024x1024, Model hash: c64ba5dbde, Model: novaFurryXL_illustriousV110, freeu_enabled: True, freeu_b1: 1.01, freeu_b2: 1.02, freeu_s1: 0.99, freeu_s2: 0.95, freeu_start: 0, freeu_end: 1, Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

then some Paint.NET editing and img2img: 

parameters

furry, anthro, duo, sex, foot focus, feet focus, foot job, paw pads, pink paw pads, cumshot, cumming, thick cum,
BREAK,
2boys, fox, male/male, canine penis, balls, knot, adult, young, excited, motion lines, age difference, size difference, father and son, large cock, amber eyes,
BREAK,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, absurdres, depth of field, newest, scenery, ultra-detailed, detailed eyes, detailed fluffy fur, dynamic lighting, 8k, HDR, ultra-HD, highly detailed, HDR, realism, realistic, photorealism, photorealistic, realistic lighting, caustic shadows,
BREAK,
son giving father a footjob,
Negative prompt: (honey), human, (worst quality, bad quality:1.2), lowres, low quality, bad male anatomy, bad female anatomy, grainy, noisy, render, filmgrain, text, deformed, disfigured, human penis, (female), (breasts), abs, extra fingers, bad anatomy, extra fingers, white background, black background, signature, patreon, web address, text, feral, blurry, faded, antique, muted colors, greyscale, boring colors, flat, bad photo, terrible 3D render, black and white, glitch, cross-eyed, lazy eye, ugly, distorted, glitched, lifeless, bad proportions, watermark, window, human penis, vagina, looking at viewer,
Steps: 40, Sampler: DPM++ 3M SDE, Schedule type: Karras, CFG scale: 5, Seed: 3371440220, Size: 2048x2048, Model hash: c64ba5dbde, Model: novaFurryXL_illustriousV110, Denoising strength: 0.45, Version: f2.0.1v1.10.1-previous-669-gdfdcbab6

Then a lot of inpainting, coloring in Paint.NET, and upscaled: 

Postprocess upscale by: 1.4, Postprocess upscaler: 8xNMKDSuperscale_150000G