If you had to have several discussions on providing an honest advance notice, I understand your concern. But sometimes you gotta just say WTF and go for it. Feeding a baby in the arm just may provide that emotional "home feel" to a young buyer.

And as for a few messes, openly saying the owner had 15 minutes notice and the house still looks great provides a message on how the property is kept. I've experienced a couple ex DIL's that it's obvious they were never learned on cleaning a house. Cleaning was the last thing on their mind. You just gotta roll the dice sometimes.