Do you have any cute nicknames for your in-laws (MIL, FIL, BIL, SIL...)
In case you have, does your in-laws know about them? (or) did they find about it on any such situation?
Do you use those nicknames to refer them when talking over the phone to someone else?
In case you have not kept any nicknames, here you have a chance. What names you would like to keep now?