Welcome to the Forum!
Diabetes is hereditery or atleast it has a lot to do with it.
The blood/sugar level 2 hrs after eating; That is 2 hrs after the first bite of food. This is outlined in the T2 Sticky, Blood Sugar 101.
Quote: "In subjects without diabetes, blood glucose levels typically peak approximately 1 hour after the start of a meal and return to preprandial levels within 2 to 3 hours; 2-hour postprandial blood glucose levels rarely exceed 140 mg/dL."
I hope the information helps.