Kindness, respectful, not give bad back, but don`t give them anything they can use against you and limit your contact to what you can handle. Change subject, walk up, leave, go to the bathroom, say something short and change subject if they persist say you do not want to discuss those things. etc. You can tell them that was not nice, and then same apply. Do not fuel it. try to get their minds on to something positive. And yes show love.