Looking at your natal (thanks for the background), I see your 9th house cusp is Pisces meaning, "ruled by Jupiter" which imo is the spiritual side of a person, what the soul has gained through past lifetimes.
Then checking out the aspects for Jupiter, I see a trine to the Sun.
This is a sign (IMO) of an evolved soul - moreso then not.
We cannot evolve easily if life is cushy and we get everything we want.
What was it the great prophet Edgar Cayce said?
"To obtain the Crown you must first bear the cross".
He often quoted some obscure line from a gospel having read it all his life, even in trance - if that particular line fit the person he read for. Its one that has given me much solace in my longer life, when it comes to suffering.
https://biblehub.com/luke/14-27.htm
I have a Jupiter 9th house in Pisces myself. Using the Tad Mann theory for natal charts - it tells us about our mother's psychological state during the time of conception. Your mother must be a person with great faith in something above her own self and her weakness. We ALL have a weakness, she is no different that way.
Compassion is best as hard as that might be.
As my mother taught me as a child and reminded me all my life until she died, "there but for the grace of god go I". That simply is putting oneself into another person's situation which brought her to this choice.
You will be blessed for caring for your dear mother - you already are