Just her being really big. So much I even wrote a story on it on the spot. She needs the extra bulk to fight a bear that's really huge and asks of what happens when she drinks her own milk.
If you already know, her milk contains the properties that makes those who take it also really huge and muscular without any effort.
Original:http://fav.me/d6qboy1
Story: Coming soon
Art (c) Cybercat, Colors (c) Xenny Diemes