My sister is getting bigger and bigger :(

My sister will be 30 at the end of the month,single and no boyfriend.Before we went back here in Philippines,my sister is still not big as she is now.But I am worried now coz she is getting bigger and bigger everyday.I just do not want her to be obese.I want her to lose weight.

Everytime I look her big belly made me think that she really needs to get some belly fat burners.I already told her that she has to limit her food intake and stay away those fatty foods or she might end up with diabetes and high blood.I know she is scared just thinking of it.She told me that she will try to control and just eat enough.