Something doesn’t sit right here.
This random acquaintance, who the OP knows little about, and who it seems has never trusted the OP enough to confide in her about the apparently abusive relationship she’s in, turns up on her doorstep, bags packed, and asks to stay because she’s “afraid to go home,” with no further context than that?
Why hasn’t she gone to a hotel?
Why hasn’t she gone to a friend or family member?
She has picked a random colleague and just turned up on their doorstep.
It’s incredibly manipulative behaviour, and I would be wondering what there really is to the situation.
I would offer to help her book a hotel, if she was genuine then she would accept, but no, I wouldn’t just let her in without knowing any details, and knowing whether she was genuine or whether her violent husband was going to turn up on my doorstep and put my family at risk.