Because Aranea knew deep down that these people's consent was necessary for her children to live properly, the part of her that wasnt wild at the thought of them being taken from her was ready to attack the both of them if they threatened her babies lives. When they had both given their consent, when her little girl was wailing and healthy, her boy just as healthy looking but quiet and in her arms, she kissed them both, shutting herself off, and only existing in the moments with her new children.
Having four arms was a boon for Aranea, she gently rocked the little girl, and gently held her baby boy to her, tears spilling over her cheeks.
'Feles..our children are so beautiful.' she managed, looking at him briefly, before letting her gaze fall back onto her chubby little treasures. A moment passed and she quietly sang to them, something springing unbidden from her, as though remembered from her own swaddling time;

Sleep, my baby, on my bosom,
Warm and cozy, it will prove,
Round thee mother's arms are folding,
In her heart a mother's love.
There shall no one come to harm thee,
Naught shall ever break thy rest;
Sleep, my darling babe, in quiet,
Sleep on mother's gentle breast.


It didnt matter that it probably wasnt 'done' for her to sing something so good, there with her children in her arms, Aranea didnt care about appearances.