You did the right thing.
I have a similar story. I was out by the front of the house, and I see this little girl walking down the street by herself, no shoes, and way to little to be by herself. I talk to her and ask her where she lives. She shows me the house and tells me her mommy won't wake up, she's freaking out about it. I starting thinking what's wrong with her mom, does she need to go to the hospital!? I open the door for the girl, she could reach to go out, but not back in. She pulls me to her moms room, and her mom was just asleep. No heart attack after all. I must have really scared her, waking up to a stranger in her room. That little girl just had me so scared that something was really wrong! I explained and left, and didn't see them again.