Tbh they r talking about wedding and yearly ritual with kami but it doesnt feel like real wedding and being together. She is just a priestess who is working under him and about divinity if its divinity immortality would be fine but its more like a curse bc of their sins. Thats why she didnt age to serve the god until the sins are all repented. Now god mistakenly purified all of that at once, 10 years later finally the curse broken and she become a woman at the end. Im a little disappointed about a long awaited kiss to be drawn like this but fine anyway, it could have been perfect if we saw their kid too. Masterpiece, thanks for the translation especially since its hard bc how she is talking.