My MIL left DC age 8 home alone today while she went out in her car on a completely non-essential errand (she was looking after DC while DH & me were working 70 miles away). There was no reason why she couldn’t have taken DC with her, and she didn’t tell us she’d done this. DC told us later, I verified with MIL whose justification was ‘they said they’d be fine alone in the house and I was only gone for 15 mins’ (the place she went to is definitely further than a 15 min round drive, so I’m guessing she was out for more like 30 mins).
Now I know the chances of something having happened to DC in the time she was away was slim and that yes, DC was fine, however we’ve never left them alone before and think they are too young. DC also didn’t have a phone so no way of contacting anyone if MIL hadn’t come back when expected.
I’m aghast that MIL though this was ok but I need some perspective please. AIBU to be really bloody annoyed about this?