Would it be better for them to know some of the situation rather than playing happy families?
I am aware sometimes of awkwardness for example when the subject of physical affection between parents crops up in conversation or on TV maybe and wonder if the children have realised there is non between theirs.
Plus I would like seperate rooms if possible eventually [not possible atm due to number of bedrooms in the house] and although this could be explained by daddy's snoring or poor sleep patterns it might be better to be open in a simple way?