Dave's ESL Cafe's Student Discussion Forums

[missdaredevil]

....If, however, your grandma continues her *folie a deux*with this man, you are pretty much without ammunition in your war against Bad Boyfriens, geezer version.

shared psychiatric disorder: a psychiatric disorder with symptoms common to two people who are very close. Often only one person actually has a disorder, the other choosing to share the symptoms or delusions of the first.

Would anyone simplify that?

Thanks

[asterix]

I think it means her indiscretion with this man. I would need the context to be sure.