Hi. This isn't a ridiculous concern. I'm just sorry I haven't been around to read this post sooner.
We had an au pair for 2 years, until our kids were really too old for a live-in. Anyway, we often didn't eat dinner with our AP because of our hours. (I'm a med student, husband works) Anyway, we had a scheduled "family dinner" on Sunday nights where we made a point for everyone to eat together. I think it's important to have meals with your AP, but it doesn't have to be daily by any means.
I'd be happy to answer more questions and I'll be around more in the next few weeks.
