Whose right whose wrong

We bet on something so you all help us decide! My husband is my first eveything. He says if I ever cheated on him he’d divorce me because someone else has now “had me.” I told him that’s a chauvinistic reason he disagrees. I think he’d be in the right to leave me but not just because I’ve let someone else experience sex with me but rather because it’s a disloyal act. Is his reason for divorce chauvinistic or not? *ALL HYPOTHETICAL GOD WILLING THIS NEVER HAPPENS*