Karen, with as many pigs as you have, surely you won't notice an extra mouth to feed
Besides, as others point out, if she's truly barren she can earn her keep as a companion pig for lonely boars. We use a castrated male for that (OK, we send them for bacon at 9 month-1 year and change to a new one) but sounds like Rora would be even better company for them: like having a girlfriend on the pill
If you love her that much, I'd say keep her