Yes, the mother could have a fit in your basement for a bit, but then settle down, depending on whether she was ever living in a home before or never adjust to a home. All you can do is try your best, do what you can to try to get her spayed, recovered, then release if she can't adjust to home life. You are her angel and only hope right now
My Sweet Pea took months before she would allow any human to come close enough to get her when she was living on the streets and you know what, when she came into a home, she was so relieved. She was a whole different cat.
Rose was a factory cat who would hiss at me for months while she was in my basement, but now she is the most loving out of all my cats. Still can't pick her up, but she loves being a house kitty.
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