kiev, you have been given an invaluable gift as you take comfort in knowing your mom had figured it out. she owned her responsibility, and now you can let go of that and concentrate more fully on the how the abuse affects you, without the complication of how it made more difficult your relationships with others.
the old 'blame the victim' mentality never works. obviously, what you were trying to get across to them was so unfathomable to their sensibilities that they perhaps chalked it up to youthful insolence. speaking from my own experience, my own parents were of that generation who, shaped by the values of their era, were ignorant to the deep psychic needs of children to be treated and disciplined with the crook of nurture, not disregarded and dismissed with the backlash of denial. their response was understandable and quite forgivable.
i get the sense that you have arrived at the gates of our community with very little baggage in tow, and that you will blossom and flourish rather nicely in your recovery here. how appropriate that the time of your arrival here coincides with the blossoming of spring.