We did have a discussion The ethics of consent before casting about a topic similar. Maybe this one would be of help too Ethical Witchcraft 
What Are Your Thoughts?
If your mom has no issue with it being done for her, then a return to sender or banishing type of spell. There may be some helpful information here too: Trapping dark entities
The only time have done anything for someone was, they called and asked me for a protection jar. I sent her the jar & she just had to include a clear quartz & put it under the full moon. Would she be open to something like that or a protective charm or amulets to wear?