User blog comment:WillofOP/Slim Fast/@comment-3119203-20111229001317

Oda has been known to do this kind of stuff, remember the Shichibukai? They looked nothing like their silhouettes. But the timeskip theory seems good, I bet after WB died, she looted a bunch of his islands and took them over, so now she had a ton of new food income. Hence, fatness.