That may well be, however I suspect you're going to run into quite a few people on this board (myself included) who take issue with people working for free. We're professionals, we should be paid as such. People who work as a CFI for free are lowering the profession for the rest of us who are trying to earn a living.

Now back to the topic, I'm not sure if this would be related or not, since you are both technically "employees" of the LLC, but I can tell you that when I'm paid to act as CFI for a private owner's aircraft, a 100hr is not required because my services do not constitute "operation for hire"