You know, them just being a married couple with a family... and still being swingers is also fine.
The popularity issue is just that you're not being favored by itch's algorithm enough yet. Tags, downloads, and consistency of updates are key, and you're doing okay with those, but f95 is a classic forum system afaik so posts are probably helping you a lot there. Itch is very different, but then even super popular games like Third Crisis have been getting buried lately, so I wouldn't worry about it.