smelly husband

OK serious question does anybody else is husband or so smell really bad. Let me explain. It seems to happen more at night where he emits a terrible putrid smell 😷 this has beem going on since we has started gaining weight. we started dating in 2013. he was super fit back then and smelled great. we didnt sleep in the same room till we got married in 2015. he started gaining weight in 2014 and the smell of garlic and onions started but slighty. well when we got married and moved in together i noticed he reeked. he doesnt listen to me and thinks im lying.now im pregnant with our first child and the smell is just even more overwhelming. i dont even want him in the same room lol he sleeps in a seperate bed and in this cold ass weather i HAVE to leave the window open to air it out because it really makes me sick. 😔 idk what to do. he gets mad if i even bring it up. advice? hes 6'1" and weighs around 280lbs