I reset her with MC and it completely changed her looks but didn't allow her to age up or go into CAS. But I didn't give it a day or two, either. I just reverted back to my earlier save, the day before her birthday and aged her in CAS before her birthday happened.
I have overwatch and my alchemy consignment store clerk has been stuck on aging (both in this save and in the last save in a different town) through pretty much 6 sim years (1 year = 1 full set of seasons/7 days a season). It gives me the notice every night at 3am, but it's never aged them up yet.