Moral dilemma...

Hey guys, so I am on my period rn, which kinda sux because I’m genderqueer and it feels... just... ugh. Anyway, the only good thing that comes out of it is REALLY GOOD SELF LOVIN’ (I’m worried I’ll get judged for saying that just FYI it’s probably no big deal right? Lmk if it makes you uncomfortable). Anyway I’m in this really lovely relationship right now, with an incredible woman who has my whole heart completely, but right now I have this urge to start masturbating to erotica or porn or something. Are these urges unfaithful- like is it gross that I would rather fantasize about someone other than her because I don’t want to think about her in a sexy way? Or are they normal because the only person I’m having sex with is myself? Idk. Is masturbation okay in a relationship?

Thanks