Responses
I thought that maybe the younger brother bit him and his family is trying every possible way to keep them apart, but your theory sounds more plausible...maybe the younger brother forced his family to keep Oliver like that...
what if his 'mate leaving him' was actually just planned by his younger brother to keep him from having a lifetime partner/mate(?) and to basically have him all by himself in a way he wouldn't get condemned by his parents(?) idk tho, maybe im just overthinking, the younger brother gives off big yandere vibes so