@Blep
When I was a little girl in the 60s, I was taken quite often to visit mum in the asylums that were like grand mansions in beautiful landscaped gardens. Long since sold off to developers for the posh people to live in *cough*..... my dad was as as useful as an udder on a bull when it came to concrete facts about those times.. Also he was shattered by the repeated attempts my mum made to take her own life. Back then, that wasn't a vote for Husband of the Year and there was heapings of shame and guilt. I know now that dad would not have been a reliable narrator.
This is what you are seeking, for yourself, for your child : a reliable narrative that you have
validated for yourself and it is vitally intrinsic to your identity as a female, a woman, a mother, a daughter to unearth your mother's story. There is a definite before and after schism dividing her life and there is tremendous loss all the way around. What sort of mum would she have been like it it wasn't for that incident that took her away? If only....if only....
This is a sword that cuts both ways and I encourage you to reach out to your mum and be women together - put aside the cultural assumptions on how she should have been, how you must feel, there are no rules here at all.....feel your way. You have the chance to go to the source (mum) to have your confusion cleared up.....straight from the horse's mouth.
“And the day came when the risk to remain tight in a bud was more painful than the risk it took to blossom.”
― Anais Nin