How I imagine Mummy
We don’t know much about the relationship between Sherlock and his mother from the series but imagine this scene:
On a day that seems to be lovely and peaceful she’s having a nice cup of tea. Meanwhile she grabs one of the newspapers from the kitchen table. She is about to drink the hot, steaming liquid when she notices the front page and immediately drops the cup. The newspaper soon joins the broken cup on floor and there’s a woman’s desperate cry.
In my opinion “Mummy” is proud of her children but she has never had a close relationship with Sherlock like the one she has with Mycroft. That doesn’t make her a bad parent because she really cares about Sherlock, she just doesn’t want to be a pain in the neck.