She told me it is a 1.5 gallon (eeh...little on the small side, but could be worse) heated tank, and I quote: "he (meaning her brother) cleans her (tank) regularly, partials ("spot clean") her (tank) every other day and fulls (full water changes?) once a week. " She also told me that it was not filtered.
-uses spring water + water conditioner
-uses 1 tsp of salt per gallon
He (the brother) thinks she is just gravid, but that isn't quite what it sounds like to me. The fact that she eats nothing but dried bloodworms is odd. Bettas are pigs, and will eat almost anything. The fact that it is on one side of the body doesn't sound like she is gravid. Gravid would be equal on both sides of her if anything.
Anyway. That is all I know about the betta.