I don’t think this is because of the cards, specifically. It sounds like a parasite was bothering her and jumped to you. The cards were a link but would have been a phone call. Parasites as they get bigger can infect multiple people at once and they typically jump to the next easiest target in line.
So I’d look at this as a “how to not be a target for parasites” in a general way. And like a lot of these things, it’s not really worth going all out on trying to block 100 percent of the avenues, 80 percent will do and them knowing how o get rid of them if tere’s an issue.
This is what “having good spiritual hygiene” is all about: trying to beef up your protections and knowing a few self defence moves so you are not an easy target.
So the next question is, what are your current protections in place? They seem to have failed, so it would be good to know why and whether you need to fix anything (you might not).
Do you have any wards and shields up normally? With the banishing, what happened?