The envelopes contained messages from Gerry to his wife, all ending with "PS I Love You".
"I’ve done it. I’ve written the sequel to PS I LOVE YOU and it’s titled POSTSCRIPT," Ahern wrote to Instagram. "It’s the P.S to my P.S of 15 years ago and writing it has been an emotional experience. I don’t know how I’ve succeeded in keeping this a secret for so long but I’ve been bursting to share it. 💥"
She added, "POSTSCRIPT will be published September 19th in the UK & Ireland. I hope you’ll welcome back Holly...and Gerry...and ugly cry through the story as much as I did.💙 #Postscript."
Here's hoping it gets picked up for a film sequel, ASAP.
This article originally appeared on marie claire