I too have seen the different sides of the same person as the disease progresses. Those sweet, good-hearted people get buried somewhere way deep down inside and what emerges is often frightening. Not to mention we're so busy working and keeping things together and taking care of kids that to even imagine having the time to plot and stalk and all those other things is really foreign - until you experience it.
A friend told me a few years ago - Desperate people do desperate things. Keep that in mind as you move forward with the things you have to do to keep you and the boys safe.
You'll make it lady! You're strong, smart, talented and resourceful. Hugs!