When Apollo found out about her infidelity through his prophetic powers or thanks to his raven who informed him, he sent his sister, Artemis, to kill Coronis.
wˌɛn ɐpˈɑːloʊ fˈaʊnd ˈaʊt ɐbˌaʊt hɜːɹ ˌɪnfᵻdˈɛlᵻɾi θɹuː hɪz pɹɑːfˈɛɾɪk pˈaʊɚz ɔːɹ θˈæŋks tə hɪz ɹˈeɪvən hˌuː ɪnfˈɔːɹmd hˌɪm, hiː sˈɛnt hɪz sˈɪstɚ, ˈɑːɹɾɪmˌɪs, tə kˈɪl kˈɔːɹənˌɪs.