This implies my mother can operate a computer. XD
Likely, it will be my sister doing it for/with her.
Well, I've stopped giving a fuck about private browsing, so in the event they look at it, these will be the likely reaction:
Ask me what "Lolicon" is.
Scream in horror.
Threaten to call police out of stupidity.
Disown me.
Undisown me after hours of talking.
Make more stupid cracks than ever(and it's at around 58 a day already >.>).
Ask me what 99chan is.
Watch her mouth drop.
Yeah, that's about it. :L
EDIT: My reaction would be as follows: