At what age is it inappropriate for kids to be naked around the house?

We are a very open household. My husband walks around topless (he does have boobs) as well. 

I asked my daughter to put on a shirt she asked me why and proceeded to say that I am always naked and her dad is naked (topless) she is being truthful and I told her she could keep hers off. She feels comfortable and I feel kinda bad even asking her to do so. This is her house too and I think until she feels she should do different she is ok. I will not ask her again unless company is coming over. She knows when she is ready I guess. I'm glad that she hasn't had any skewed body image issues yet and that is why I'm gonna stop because me saying what I suggested could cause some. What is your take?

Happy Mothers's Day!