I would cut your MIL some slack, she loves her grandchild. Right?
Agree. Stuff happens! The first time LO gets a bump or bruise on your watch, you'll want forgiveness, right?
I bumped DD's head on the swing when I put her in the first time. She was three days old and I was sure I had addled her brains. My mom tells me she used to bump my head into door frames all the time! She has a phd but was unable to remember that the baby's head sticks out past her arm!