Mom-Son.

We are living together outside the town for 20yrs now ever since dad left. I am in med school, and you work for the bank. We have never had anything sexual between us but since we live in a small house we are aware of the presence of each other and are comfortable with it. Both of us have active sex lives and social lives. We try to be modest as much as possible but we seeing. each other in a less than modest situation is not uncommon and we have learned to ignore it. We enjoy each others company and That's where it is. (leaving it here to allow you to develop your character)