is he hiding something?

so i wanted to buy a prime item on amazon, hes the only one who has prime, i dont. i ask him to give me his password to his acct, so i can buy it. but he wouldnt let me at all, he said he doesnt want me to know his passwrd cause thats the passwrd to his email. like wtf u hiding bro!? before he wasnt secretive like this, even w his phone. and during those times i always come across porn, hookup sites, craigslist personals, just things he shouldnt be doing while married. and he says he doesnt want me to go thru his things cause i always make a big deal out of it, causing problems. but who wouldnt w those kind of shit!? he wouldnt want me browsing those stuff.