Ustadh Farid Dingle is asked whether a son can force his mother to wear hijab.
Can a teenage son force his mother into hijab or certain types of clothing?
A teenage son cannot force his mother to do anything, but he can and must, just like anyone else, command her to comply to Sharia which includes wearing the hijab and dressing modestly.
Please see What Are the Requirements of Hijab? for more detail.
It would be a good idea for both mother and son to read these together too: A Reader on Calling to Allah, Giving Advice, and Commanding the Good.
I pray this helps.
Checked and approved by Shaykh Faraz Rabbani.