Catechism of the Catholic Church §1737 — excerpt
An effect can be tolerated without being willed by its agent; for instance, a mother's exhaustion from tending her sick child. , a death a person incurs in aiding someone in danger.
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.