Actually, I really shouldn't post on this one...BUT...I feel that I should share with the World that my Mom is an Cel/Anime Addict.  And I myself am a Mom...
I'm at a lose for words...I realize that not all Moms are cool and laid back or even understanding about why we do the things we do...just be patient with her,  take what she says with a grain of salt and tell her that you love her...time and patience on your behalf might, someday, help her come to understand that some addictions in life aren't all that bad:)

Wishing you the best of Luck-

Kayura