My aunt has diabetes type will it increase her risk of heart complications?

Yes: Diabetes does increase risk of heart complications. In fact, we consider diabetics to have similar risk to someone who has already had a heart attack. For this reason, we aggressively treat associated high cholesterol, high blood pressure, and frequently recommend that diabetics take a daily aspirin. Further, it is important that diabetics try to stop smoking, exercise, etc. To moderate risk.

It can: But can reduce risk with excellent control of sugar, blood pressure and lipid levels.