Your Maltese isn’t human. In this case the protection of the child’s soul comes down to whether your parent is a moron or not.
Replace “moron” with “unrepentant lesbian” who will not raise the child in the Catholic faith.
Why not go down to the nursery at Long Island Jewish Medical Center and secretly baptize those infants?
Why not baptize people on a public transit bus or at an airport boarding gate. You could be a missionary extradonaire!