High Sugar and Urine infection. Normal?

Hello Doctors, My mother is suffering from Sugar and Urine infection since past 2 months. She is also admitted in hospital for 10-12 days as her sugar level was high at that time and she was very weak as well at that time. But now she is fine but sugar and urine infection is still there and proper medicine treatment is going on along with diet chart. But her sugar level is still high. After observing it with Gluco meter On fasting her sugar level is ok (between 120-160) But after 2 hour lunch ( her sugar level is 200-280) (Above sugar level limits is from 12th October till today) Please suggest when this sugar level is going to be normal? And what precaution should my mom take to resolve this sugar problem... Thank you!