mourn → the stars are not wanted now, put out every one; pack up the moon and dismantle the sun
As strange as it may seem at first glance, Veda came to Riva for peace and she gets it. If her mother had come to Dal Perivor as she'd wanted to, there'd have been none of that; Veda's own duties aren't onerous, her attempts at advancing her husband having never come to much of anything, and her mother would've had nothing to occupy her thoughts but Veda and Mayaseralle.
And guilt; for telling Veda to her face she was throwing herself away on a fool, for thinking even privately that at least without him Veda might shine on her own, for having trusted that at least such a private kingdom might shield her eldest from crueller realities they knew better.
Ceredu had not been a great man, or a brilliant one, but he'd been a good man and he'd made her happy without the terrifying edge of obsession that she'd witnessed at its worst in her mismatched, unhappy parents; she loved her father, respected his memory more than she thought her mother ever would, but the idea of committing herself as wholly to someone like him sent her running for the cover of a man who would never have been her intellectual equal.
No, what she wants isn't to wallow in her mother's pain for her and guilt for not doing better by her; she wants to shut the door and cry behind it, to have no one need her but Mayaseralle, to have nothing that demands a straight spine and cool set of eyes. Ce'Nedra, she thinks, doesn't understand the way that they grieve - but she understands that it is what they need, and she aims her gratitude in the correct direction when she understands exactly how well she's been accommodated in the citadel. (She had, due to a long experience of Arendish women and those who'd spent too much time around them, personally gone through Veda's apartment and removed anything she could do herself an injury with- but it was more for her own peace of mind than her foster child's and Veda had accepted the interfering demonstration of love for what it was.)
When she comes out of her seclusion in subdued Rivan grey, the world is the same as it was before and her heart still hurts, but her little sisters want to play with their niece and her mother needs the assurance that Veda intends to survive her loss, and the royal couple she persists in thinking of as their patrons are owed her gratitude and affection. She has a life, still, and she's grateful for it.