If i have an open relationship is it wrong to have a FWB also?

i like them both physically however my open relationship guy is the one that i would like to be with but we are seperated by distance so we see each other once a month at most, he is the relationship type, jealuous type, however my FWB is not, he is more like me in that aspect,he has his own gf who is in a long distance relationship as well, my question is, is it wrong to have both at the same time n not tell the guy im with in an open relationship?