query for parents in laws visa

i am inviting my parents in laws in feb end,my wife is pregnant and due in march...my question is if in counslate if they ask "if your daughter is pregnant?"
should they give true or false answer as i have read in this site that it should not be mention...anyone with similiar exp or any knowledge plz help me!

I do not think they would ask this question at all. Experiences listed in this site didn't mention about this question. But it is better to say 'NO'. I know this is very tough but that is the way the world is.