Welcome Greta, glad you could join us.
Your story sounds a little like mine except I'm the Mother with SPMS after 17 yrs of remission and my DD is non symptomatic MS, at the moment.
I'm not going downhill anymore, though, since I've been on LDN. Get your Mommy some, it may help slow her progression.
BTW my Daughter (36) has been on LDN from the beginning.