I see it like this. If you treat your business like a business and act like you should during business then I wouldn't worry about a thing.
My husband used to work with me for years. We did not do anything that one would do while on the job as in "relationship stuff" even though we were home, we ran a business and only conducted business during that time.
If we worked any where else it wouldn't be except able to be affection on the job so we just didn't at home while working either. We didn't even talk about personal stuff while we worked together. It helped us a lot.
So if that's the case then I wouldn't bat an eye lash and tell the parents anything about your personal relationship.
Oh but I would sneak a kiss or a pat on the butt when I would pass my husband in my office where no one would be.
