This quest is not available in game.
Return to Thrall at Grommash Hold in Orgrimmar.
You have slain my husband, <race>! My child will be born into this world without a father.
<Princess Moira points directly at you.>
I assure you, this child will be the next ruler of the kingdom of Ironforge. You and your kind shall be hunted down until the end of days for this wrongful act.
<You think that Princess Moira may be suffering from the residual effect of Thaurissan's spell.>
Leave me be, <race>. I am certain your warchief will be eager to hear the results of his meddling.