Before or after becoming a zombie?
Because here’s a good story on the former:

Zombie Wife | WEBTOON In a remote cabin in the woods, a man named Milton lives a quiet life with his wife, Shauna. Everything is what he could have dreamed for!.. except for the zombification of his better half. But despite this, Milton does not give up the future he dreamed of. Is he the most devoted husband ever or is he just plain crazy? https://www.webtoons.com/en/thriller/zombie-wife/list?title_no=5972