On one hand it's rare to see an the author take the leap of putting another guy in an x scene unrelated to MC.
On the other, how about you just don't? The story is supposed to follow the main character/s, not the x scenes.
ehhh i'm betting that maybe the gladio is sadly secretly apart of the slave trade in some form (maybe funding the traders) foxwife then finds out then we cue his backstory/big ass reveal about how he never view her as a person but as property (does that sound generic enough? lol) then MC has his
SEX harem stop gladio and send his ass to jail or something and in the end MC will keep foxwife in the harem to make her feel not alone or something so maybe foxwife will end up with the MC in the end
but (imo) it should not because c'mon chances are MC will still get alot of girls it's perfectly fine if some are taken already (plus we got a
seggs scene with her so who cares??? personally idc if some will be taken by some other man, if we still get
seggs scenes then idfc)