So... This is a longshot, but what if Sarek and Lwaxana hook up or whatever (before Perrin and Ian, I guess?) and Lwaxana has Sybok. Somehow (details TBD, probably involves Q because I can be a lazy writer like that) Sybok is sent back in time where he's found and adopted by Sarek and T'Rea. No one knows what to make of Sybok because he's a force of nature like his mom, but no one knows he's half Betazoid because they hadn't even discovered Betazoids back then.
T'Rea decides to pursue the kolinahr after several years of Sybok's eccentricities for some peace and quiet.
Sarek, single again, decides to pursue human women for reasons even he doesn't understand.















