Do situps
Ya, that makes you lose wait quick and easy!
For reference, it doesn't. It actually hardly helps at all and, if anything, would make you look even larger as it builds the muscles under the fat without eliminating any of it. Losing weight isn't an easy task. :I
But that isn't even the matter at hand. If she is such a poor doctor, why do you keep going to her? Tell your mum you need someone else. It may not be easy cost wise, but she seems to cost more than she is worth already. :/