I'm Going to Be a Mother!

Ir a plus an infinitive is a common spoken future tense:

"What are you going to be when you grow up, Susanita?"

"I'm going to be a mother!"

"Your father has a unique way of taking a rest."

Notes:

The subjunctive is used in the first panel because it's a hypothetical future: llegar→llegues

Note the lack of the article la in Voy a ser madre