Should I Cheat on My Non-Alpha/Vanilla Husband?

I’m a half black, half white sub-bottom married to a very vanilla non-dominant top who has no idea I’m into being dominated with raceplay. I have chatted with a local white dom who wants to own me and use me. But, I’ve never had sex outside my relationship (unless phone-boning counts). Part of me wants to do it to serve a master who understands my place in society. But, it’s obviously wrong to do this to my husband. Can you help?!