Super naggy type of mil is very annoying, especially little little thing will make into a big deal. Say certain things/instructions must say like 4-5 times on repeat.
Example: Our baby standing X meters away from tv, she said cannot too close to tv, got radiation, move her back 10-15cm then she is ok with it. Like that little distance is gonna make a difference. Okayyyyyyy....
Then comment about the way you take care of the baby as if it is her own baby and as long as you don't do it the way she does it, like carrying the baby a certain way, high chance she will comment and tell you to hold baby her way because safer, because baby will feel more comfy etc.
She generally means well but holy shiet it is enough to drive any sane man up the wall.