I am thinking the lonesome/checking in/drunk dial motive seems reasonable, calling before going to sleep. Calls from 2:26 to 2:44 am IMO suggest she didn't get to sleep until 2:44 at the earliest. And she was alive until 2:44.
- They got home at 2 am (IMO), took a bathroom break (lots of drinking, long wait for food), let the dog out
- Eating of the Carbonara
So in that case the dialing would have started before or during the pasta feast.
Less likely IMO: The threat emerged immediately and these were emergency calls, for instance if hypothetically the Uber driver followed them inside. However, dialing 911 would make more sense in that case.
I just read that you can say “Hey
Siri,
call 911” and she will do soi phone