The mom in dreams could either represent you or your own mother. If you are the other it is very common dream to see the mother. The dream could also be interpreted as your spiritual guide that is called Mom.
Dream dictionary: porno mom dream meanings
(See Mother).
Dreaming that you are viewing pornography indicates your issues with intimacy, power, control, and efficiency. You may have concerns about your sex life. Dreaming of a porno movie suggests your desire to be more sexual.
The mother could represent you as being a mom. The mother could also indicate your own mother or the God that you believe in.