All fan fiction takes place in an alternate universe separate from the official story, and each piece varies depending on the author. So even if I share a favorite character with someone else, I’m not being cheated on or toyed with by him.
more thing: Even if the official story later reveals that Devil already had a spouse in the first game, my version of him is in a different timeline, so he hasn’t even met that woman yet.
All fan fiction takes place in an alternate universe separate from the official story, and each piece varies depending on the author. So even if I share a favorite character with someone else, I’m not being cheated on or toyed with by him.
P.S.: Even if Devil’s girlfriend appears in the official story in the future, my Devil exists in a different world line from the official one, so it won’t affect our relationship in any way.