Do you think my mum would like a Wii and Wii fit for mothers day?

I think it will be good because it is nearly winter here (S. Hemisphere) and she cant go for walks very often because it is raining. Do you think this would be an insulting gift? Would it be like saying you are fat lose some weight? My sister thinks the only reason I want to buy it is for myself and although that might be a tiny part of it my first thought was that mum would like it... what do you think?