1) "I thought about reminding her of giving the dogs they're heartworm pills, I think I'm going to wait until next month."
Uh, unless this was your job (which I'm guessing it wasn't), stay out of her sh*t. She will NOT appreciate you telling her what to do when she already has it taken care of. Asking to see report cards is entirely different. It SHOULD be your responsibility to see them.
2) Step away from denial. The yearbook thing was intrusive, stalker-like, and any gift that might result would be MUCH MORE about you trying to emotionally manipulate W than anything else. I would suggest you refrain from doing anything with the pictures that you scanned other than this: DELETE ALL COPIES from your computer and email W, "W, it was inappropriate for me to take your yearbooks and scan your pictures without your permission. I had planned to use them to make a gift for D, but something that involves your picture should really come from you at this point. So, that was also inappropriate. I'm sorry that I clearly crossed a boundary. I have deleted the scanned images from my computer and no longer have any copies. Again, I fully understand your anger, I will do better, and I am sorry."