Zeus was still in a rather foul mood. He'd stomped around his apartment for a while after Thalia had left, seething and drinking too much. He'd thought he'd raised his daughters better than to go off and have the children of Titans, and that Titan in particular.
And now another Muse had come to see him. Euterpe had always been so loyal to him, and that, more than anything else, helped calm him enough to see her. He buzzed her in and waited for the housekeeper to show her to the library, sipping some of Dionysus' wine as he waited.