I only masturbate when my parents are home.Dont know the fear of getting caught makes it better.
As for the question:
There is something wrong about it.At least act like u dont want to be caught.Yea shes ur mom she wouldnt say anything to you,but it really would feel awkward like she knows ure doing it and u still keep jerking off.
Quit it..Go to your room and finish the job
My parents know I masturbate,i mean who doesnt masturbate?But that doesnt mean that my parent can watch me doing it..