Kate that is a very cute story. My daughter, now 24 and married, was only 1-1/2 when I got hit with RSD. So, daddy has been hurt her entire life.
It's incredible how perceptive and caring a young child can be. They can learn a lot more than many people give them credit for. Be sure all of your children get a good understanding of how mommy is hurting and what is ok and not ok.
If you have good days (I had some long stretches where I felt half-way decent) make sure you take advantage of them and really do something fun and memorable with your kids. My daughter and I have some great memories of times together.
Take care!
Mike