I have a character who is a step but beloved mother towards her adopted children (MC included), Her name is Midha.
She was kidnapped, blessed by a deity that gave her power and ability to be an assassin, and trained to be a Hashashin.
All goes well for her until she fakes her death to live a normal life with her family, only to be discovered, hunted down, took away her blessing, and passed on to one of her twin sons whom they kidnapped the same way they kidnapped her when she was a child.
The side effect of taking away a god's blessing is that her health slowly deteriorates. She doesn't cough but she suffers daily fevers, finds it hard to stand, and do things herself sometimes but despite all this, she remains resilient for her children's sake.
She's still kicking.