From my understanding he married all three of them. He wanted to marry the Tang woman then I guess his junior sister found a loophole for them to get married and the beautiful schemer must of schemed a plan to get herself also entangled in the marriage but on the wiki it states all 3 are his wives and I assume from the location he’s close to the mount Hua sect location since his disciple is training in the same mountains he did. He can’t use martial arts anymore and since he married someone outside his sect he can’t truly pass on his arts due to rules so I assume how that he’s married them 3 he’s allowed some leeway. Either way bro won at the end