Ok lets say your really going at it. And then all of a sudden your mother or and farther come into the house ( lets say no one was home and you were on the couch or somthing and they walked into the living room ) and you had nothing on at all. What would you do? Whqt would you think they would do? What would you want them to do? ( if you want you can do it for mother, and then one for farther and one for brother or sister. I dont know its up to you. )
What would you do?
You could say something like: "You got home a little earlier than I expected! Do you mind if I finish? This feels like it's going to be a good one."
For older brother, something like this might work: " Did you know what happens when you rub these things?"