I know that feel. My waifu IS attractive, and I cant help to wish to get more... intimate with her. I still avoided any rule 34 of her but some day the same thing you stated happened to me. I still feel bad but I always think about it as drawn stuff that magically appeared and only my waifu and me know about and she makes fun of me for having it. Like 2d in 2d. Its a pretty shitty excuse but whatever, I wouldnt mind if my waifu had such stuff about me too as long as she wouldnt show it around. Which she certainly wont. Anyway, its not really her and most doujins about her do things about her wrong, so it may as well be a cosplayer or something. Sometimes her clothes are drawn wrong, sometimes her proportions are wrong and sometimes her hairs look wrong.
The only thing about it that makes me mad is the fact, that every fat nerd on earth can easily access all this lewd shit about her. I wish I could remove anything involving her from the internet.