Twilight suddenly realized that she had been working under the assumption that Sunflower would want her condition kept a secret, that she didn't want other ponies to know about her lack of magic, but was that actually the case? Perhaps the earth pony desperately wanted help, but didn't know who or how to ask? The studious unicorn realized that she couldn't make that assumption, either way. She'd have to talk to Sunflower about it when she arrived, and leave the choice up to her. 