What a relief that Simba is fine! The baby sounds adorable too. Have you seen mommycat around anywhere? The best way to bring the baby to trust you is food and patience. Several summers ago we found a baby kitten stuck in the well to our basement window and his mommy was nowhere to be seen. Soncat started feeding the baby each day and before long the kitten would go to Soncat but nobody else. We named the baby Sebastian. By summer's end I decided Sebastian would be ours. Soncat had to go back to Rhode Island for college but I decided to get Sebastian to the vet's when I got back. We went up on Saturday and when I got back Sunday afternoon, Sebastian was gone & I never saw him again I have to believe someone got him and gave him a good home.
Good luck with the baby and please let us know what happens?