Maybe Fleur did something with her abs which would trap Fooly or something, and his Master is taking it as an attempt against his life or something. Definitely not because she has a 0 in terms of abs and is jealous, which explains why her top is only a sleeved cape. Not that it doesnt look good, im just saying if you want a lot of ab exposure, a sleeved cape is the third best method, right behind a bikini and just flat out being topless.