I tried so many times to quit this kink of mine (about imagining my wife being fucked like a slut by other men). I feel so disgusting about it, and many times I tried to restrict myself from porn/reddit etc just to escape from it, but whatever i do I cant stop thinking about it. Lately our sex life has declined, not due to connection, but more due to busy life. Thats why i started jerking off more regulary. I tried to jerk off to regular porn and instagram models, but i only get half hard, and cum a little bit. But If i watch cuckold porn and imagining her with other men I am hard as a rock and i cum a lot. I have also insecurities about me being able to fulfill her needs properly. I mean size wise... I am average 6" lenght 4.5-5" girth. She is larger women 5"9 170lbs, and I am 5"8 140lbs. I have never made her cum from penetration, I always have to rub her clit for her to cum, and sometimes when she is really horny and wet, my girth just feels humiliating, like I am fucking i dont know... It feels like 2 cocks of my size can fit easy. I know from stories her ex was hung, she doesnt like to speak much about him, but few times we talked about sex before us, and from her stories I would roughly estimate him about 8"lenght and 6"girth more or less... Anyway he was well hung and she said she used to cum like crazy from penetration, but she related that to being younger crazier and horney. But that story story doesnt hold cuz she is 29 now. Anyway... all advices are welcomed.