NYC whistleblower unmasked after exposing alleged Spence school affair

We’ve uncovered the secret identity of the dreaded Spence Spammer!

On Tuesday, a mysterious figure posted signs around the illustrious Spence school — whose alumna include Gwyneth Paltrow, Kerry Washington and Georgina Bloomberg — exposing an alleged affair between two staff members.

“Attn Spence Families: [Redacted] is having an affair with [their] subordinate [,redacted,] who is married with a three year old son,” alleged the black-on-white printouts, which were plastered on lampposts and other surfaces.

The scandal sent Upper East Side parents into a frenzy, with most suspecting that the spouse of one of the alleged lovers had put up the signs. Not so!

Page Six has discovered that it was in fact the furious father of the alleged scorned wife who decided to teach the supposedly wandering beau a lesson by revealing the purported romance.

“He was very angry and took it upon himself to do it,” said a source close to the apopleclictic pop, “It’s his daughter and his grandson who are the victims.”

Insiders allege that the relationship has been going on for about a year and a half.

They say that a year ago, the guy confessed to the romance but said it was over, and the family have been trying to rebuild their lives ever since.

But then the affair was revealed for a second time in recent days.

Apparently he learned about the posters Tuesday and called the (largely unsympathetic) wife about them.

We reached out to the alleged cheaters but they didn’t get back to us.

Spence told us that it wouldn’t be commenting on the matter.

Parents at the Ivy League feeder school — which has class sizes of just 13-18 — pay over $70,000 a year for tuition.

Other notable graduates include Madeleine Astor, Edith Bouvier Beale a k a Little Edie, Jade Jagger, “Odd Mom Out” author Jill Kargman, Anna Wintour’s daughter, Bee Shaffer, and Emmy Rossum.