Well, it was a realistic depiction of Elnora, she acknowledge being a terrible mother and in a very small effor allowing Suletta the happiness she deserve and work so hard to find even so she can't congratulate her fully, maybe due guilt nor because Miorine is Delin's daughter, maybe both idk, and for SuleMio, maybe be better parents than their own is a way to heal all the damage caused by their own, specially Miorine, being the mom that was taken from her so young.