Safe with Mom!
I bet the baby is safe with its mom. It takes a while for them to all get moved because they carry them in their mouth. That's not alway easy. There was a cat in our neighborhood who moved her babies from a garage two doors down to my porch. It took her over 24 hours. It just depends on how far they have to go. They stay with them for a while after each move I guess to make sure the babies are ok. Good job on looking out for them. When they are older, Mom may bring them to you to feed.