When dealing with crazy you just can't respond as you would to a reasonable person. You have to be careful. I've seen crazy like the universe is wide and I have to support you in lying. Lying is 'not' always a bad thing. If it makes you feel better I will be skirting the subject with even my husband for over two years this March and I intend to skirt for another 6 or seven. That said, I hate lying, too. In this case it's for the greater good. We are not required to come out.
What are they gonna do? Send you to hell? (snicker- Please accept my levity in the positive spirit it was intended.) Good luck with the new teenager.