Wolfy is a pathetic, loud mouthed, fat bitch 
She very clearly isn't comfortable being the size she is, otherwise she wouldn't have grabbed her big gut infront of Charlie & said 'You don't have to wake up with this every day!!'...
EVERYONE can feel fat, so of course it is relative. You do not have to be morbidly obese like Wolfy to be classed as "fat".
And Wolfy had the nerve to tell Charlie SHE was insecure! Hello, pots & kettles much! Nothing worse than an insecure fat person constantly bleating on about being 'happy the way they are' when in reality (like Wolfy) they very clearly are not...