Attorney Client Privilege?

I work at my step mom's law office working under the table as a Gopher. My sister is getting a new car from a dealership that this client my stepmom has. I told my sister that she probably is getting a discount because the client owes her money. Is that breaking attorney client privileges? I HIGHLY doubt it, because exact specifics about debt were not discussed. If anything, my Stepmother is breaking the ACP by telling everything to me, because i am not 18, and i am paid under the table (so no taxes are paid), and therefore am not an OFFICIAL employee. please let me know