"I almost left my whole family in this house, naked and all," she wrote on Twitter.
Her tweet has had nearly half a million "likes" and has been retweeted more than 80,000 times.
"IT'S F***ING MIDNIGHT I WON'T BE ABLE TO SLEEP NOW," one person replied.
"I would've been gone before I even had the chance to realise that b**** was a reflection," someone else said.
Some Twitter users were not fully convinced the nun peering through the curtains was actually a reflection.
"To be absolutely honest, I'm not all that sure it's a reflection," one person said.
"Yes! Because on the screen she's frowning but the reflection there's a slight grin / smirk," someone else said.
"Exactly! I think it's time to move out," another Twitter user said.