"You’re behaving in an illogical manner."
"You say that like I don’t always act that way."
This is a pretty good summary of their relationship, Spheina’s being weird/annoying and Vella wonders why she puts up with it. Deep down she digs it.
They met online, whatever the Star Trek analogous is for that, when Spheina was still stuck on Ferenginar. (✿◡‿◡) When Sphee finally got off that mudball with her bff Behigra, Vella sheltered them on Vulcan for a while. Vella was Spheina’s first and basically only real girlfriend.