Parents at a Catholic school in Miami said they were astounded that administrators had fired a first-grade teacher just days after she married her girlfriend, and now some of the teacher’s supporters on the faculty are scared that the school will retaliate against them as well.

The teacher, Jocelyn Morffi, was by all accounts one of the most popular educators at Sts. Peter & Paul Catholic School in Miami, where she taught for nearly seven years.

“I consider her the Mother Teresa of teachers,” said Samantha Mills, a parent whose son was in Ms. Morffi’s class last year.

But on Feb. 8, Ms. Mills and other parents at the school received an email from the principal saying that the school had made a “difficult and necessary decision,” and that Ms. Morffi would no longer be teaching at the school. The email was shared with The New York Times.