"Has she given birth yet? "
Since my little sister is very pregnant right now and we are expecting the labor to come at any time, I figure it would make sense to use this sentence as a way to say hello to my parents. My little sister, on the other hand, used to remind me that "You are going to be an uncle!", while I would close my eyes and appear to be meditating: I don't know if she is ready for being a mother, but I know I am not ready for being an uncle.