I Spy On My Teens When They Think I'm Asleep

So, um, yeah. Last night I was pretending to be asleep because it's past my bedtime and all that, but really I was just listening through the wall to see if anything interesting was happening next door where the kids sleep. And then, uh...I started whispering back? It wasn't exactly a conversation with myself or anyone else; more like just trying out different sounds they might be making (quietly, of course). At one point I thought maybe it was raining outside and that's why it sounded so strange. But nah, definitely my kids being up to their usual late-night shenanigans. Oops.