GD in Early Pregnancy

My wife is in 9th of her pregnancy and following are numbers of OGTT:

FBS – 121.6
1 Hr post glucose – 181
2 Hr post glucose – 160
3 Hr post glucose – 88

Urine sugar – Nil in all samples.

I would like to how serious are above numbers and what kind care is need for rest of her pregnancy period.
Also please let me what kind of is recommended to her.

Note: She had GD in her first pregnancy in 7th month (28 weeks).

Thanks,
Ceenu