Need Advice From Y'all That Are Experienced In This Area To Advise Me

I Really Don't Know What I Should Do. Hi everyone reading y'all stories allows me to blow some steam! So please forgive me if this isn't broken down or worded properly lol I'm not good at confessing this to anyone, this is a true story by the way, so while growing up I schooled with my now wife and male cousin. My wife is a year older then us but went to school late a year so she ended up in our grade or standard not sure where y'all from to understand the story. Every now and then I just like every naughty boy I would duck school and since my cousin traveled with the same transport he would come to my house and we'd leave for school. Anyway am sure you get the back drop now it gets hot, while we ducked school that day there was nothing to do at the house my dad at work my mum at work, it was just myself and my cousin I go outside to smoke some weed and I come back in the house, and he drops a question a young male full of come can't resist. Do you have any PORN? I smile and get into my dad's stash, pull out a movie and switched it on! While watching the women get fucked, he pulls out the fattest biggest circumcised cock head, and starts wanking himself getting harder and harder, faster and faster. My cock starts to build up boldness lmao and I pull mine out, we have two different shapes and sizes. Mine is a 9" banana shaped uncircumcised thin with the skin pulled back! after wanking all those years! While his is a big fat straight circumcised cock. We end up wanking and blowing loads of hot sperm into some toilet paper lol and I go out for another smoke, when I get back in the house my sperm filled toilet paper was removed he cleaned up. Happened again I must add.. Years later I hit off with my wife and get together and end up getting married, we quit kinky! So while my cock is banging her for all his worth I start asking her questions about her past and she confesses my cousin hit on her when we were in school! This got me over jealous and turned on at the same time knowing the cock I was wanking with when we were in school actually had bigger balls then me, to hit on such a women like my wife. She's hot even now she's hot lol anyway while banging her I confess what my cousin and I got up too, this sent her to the sky and back, she wanted every detail she wanted to even know about his cock and size of it, when I told her his cut and his a fatter cock then mine with a bigger head then mine, she was fucking coming like it was the first time she ever felt an orgasm. She creams my cock every time I bring it up.. She's horny for it no lie thing is I have never shared before and don't know if I want too. She sounds really horny for it and I even told her I'd get her pictures of his cock this is driving her crazy I'm having fun real good fun it's making me over horny hearing and watching her react to this but I don't know what to do next, and talking her helps me so yeah that's where am at!