Raina is not any normal person, and never has been, and there's never been any use in her pretending as such. So he can hear soft humming floating through the ajar door of the enjoined bathing room, steam and heat and candlelight chasing it to him.
There's soft scratching of a pen on paper, the the humming resumes, slightly altered. A quiet splash and a muttered curse; a hapless sigh that is so weary that he's sure her day must have been full of small grievances like that one.
Actually, he hasn't been there to hold her when they sleep most nights, so the nightmares have come back. She thought it was probably a better idea to take a bath than sit in the darkness and weep.
Her magic zings; a harmonic pinging in the Song of Creation in her peripheral hearing, and she knows him, knows who it is.
Her melody changes to one he's familiar with - he is, after all, the muse for it. The words always seem to escape him but it's about a brash, chivalrous prince with the strength of ten dragons. She makes him sound like legend.
The legends never talk about how tired the prince is.