It is true. The entire time my mom "visited," she played with the kids while Rob and I secluded ourselves into the bedroom to watch back episodes of Dexter. And it is also true that after she left, we started the shower for our little one so that we could watch even more episodes while she played in the "sprinkler." Might I add that I can see the shower from the same bed I was lying in to watch Dexter. It is also true that we got in a good 3 episodes that way. And yes, when we no longer heard her singing, we ran to check on her and yes, she was asleep in the shower.
(No worries, we direct the water onto the wall and it just drips down the side when she is playing in there.)