And then little Pterus got a very stern lecture about lying and blaming others for his mistakes, and had to apologize to Tiberius.
When he asked his Muma why she was sweaty and smelly, he just got some line about how he’ll understand when he’s older. 4 yr olds hate that line.
The soundproofing spell used is a one-way spell for obvious reasons. It would be awful to accidentally sleep through their kid getting hurt, another ancient horror invading Ponyville, or a surprise Pinkie Party in the foyer.