Bariga, I hope you are not beating yourself up. I know what you did wasn't right either, but it is totally understandable in my opinion. At least you have reasons for what you did. Tangible reasons that she knows she can fix and you won't do that again. With our WAS, its hard because they have their A with little reason, I feel, which makes it even harder to resolve. You're only human.
I think that she may be saying those things to make you feel guilty while not facing her own guilt. Be strong. Admit your wrong but don't take all the blame. IMHO