According to the stories from the early days of tango the mothers were following their daughters to the milonga! They were sitting there and watching what was going on and taking care of the young family members. I can see the virtual scenery where these mothers are sitting in the back ground, in the shadows of a milonga and some of them are knitting so the time was not waisted.
Yesterday evening I have seen the opposite!
The daughter was sitting in the milonga sofa and knitting! She was knitting and meanwhile her mother took the tandas!