Hypoglycemic or diabetes?

My friend has always been a little shaky when she her blood sugar is low and that she gets the shakes when it's in the 80's. Recently my son has been diagnosed with type 1 diabetes. And she has some of the same symptoms as he does. So I gave her one of my son's meters and she's been keeping track in the morning and evening. In the morning she runs from 80's to 130's. She called me the other night and she was 277 after she ate and then a short time after that she was 290. I'm nervous for her too. Her husband says I'm over reacting and that she's fine. I had to make her an appointment to see the dr because she wouldn't make one on her own. When her blood sugar was high it bothered her eyes just like it does my son. Good thing she already drinks diet pop. She 5'1 and 110 lbs and we're in our 30's. She recent lost 30 lbs quickly. She wanted to lose weight but to me that was fast 30 lbs in about 4 months. So am I scaring her or good that I'm making her go to the doc?